minor #24587 Remove BC Break label from `NullDumper` class in upgrade instructions (tzfrs)
minor #24587 Remove BC Break label from `NullDumper` class in upgrade instructions (tzfrs)

This PR was submitted for the master branch but it was merged into the 3.3 branch instead (closes #24587).

Discussion
----------

Remove BC Break label from `NullDumper` class in upgrade instructions

| Q             | A
| ------------- | ---
| Branch?       | 3.4 or master
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | maybe?
| Deprecations? | no
| Tests pass?   | yes
|Fixed tickets|
|License| MIT
|Doc PR|

https://github.com/symfony/dependency-injection/commit/7f34aa2643519f3400a6f66415a8cf9bf7147e81

This is the commit where the class has been made "final", but it has only been made final via php doc, not via code, so this shouldn't be a BC break in my opinion.

Commits
-------

fcc2146bef Remove BC Break label from `NullDumper` class

frankdejonge/symfony,mweimerskirch/symfony,smatyas/symfony,pierredup/symfony,Tobion/symfony,c960657/symfony,ragboyjr/symfony,c960657/symfony,jvasseur/symfony,yceruto/symfony,localheinz/symfony,dmaicher/symfony,Tobion/symfony,sroze/symfony,nasimnabavi/symfony,iltar/symfony,josephdpurcell/symfony,apetitpa/symfony,ajgarlag/symfony,gencer/symfony,d-ph/symfony,nicolas-grekas/symfony,jakzal/symfony,symfony/symfony,localheinz/symfony,sgehrig/symfony,andrerom/symfony,stof/symfony,symfony/symfony,paradajozsef/symfony,smatyas/symfony,michaelperrin/symfony,symfony/symfony,lyrixx/symfony,gimler/symfony,jean-gui/symfony,1ed/symfony,Slamdunk/symfony,andrerom/symfony,teohhanhui/symfony,zerkms/symfony,tucksaun/symfony,Simperfit/symfony,michaelperrin/symfony,pyrech/symfony,dmaicher/symfony,smatyas/symfony,HeahDude/symfony,hhamon/symfony,romaricdrigon/symfony,joelwurtz/symfony,Simperfit/symfony,ro0NL/symfony,teohhanhui/symfony,deguif/symfony,maidmaid/symfony,Pierstoval/symfony,mweimerskirch/symfony,e-moe/symfony,pamil/symfony,Einenlum/symfony,Nyholm/symfony,Nyholm/symfony,tgalopin/symfony,gnat42/symfony,localheinz/symfony,ogizanagi/symfony,andreia/symfony,jderusse/symfony,Pierstoval/symfony,e-moe/symfony,bendavies/symfony,sroze/symfony,docteurklein/symfony,mnapoli/symfony,WhiteEagle88/symfony,Einenlum/symfony,dmaicher/symfony,curry684/symfony,MatTheCat/symfony,lyrixx/symfony,nicolas-grekas/symfony,voronkovich/symfony,romaricdrigon/symfony,joelwurtz/symfony,ragboyjr/symfony,curry684/symfony,kbond/symfony,ogizanagi/symfony,weaverryan/symfony,pamil/symfony,bendavies/symfony,frankdejonge/symfony,zcodes/symfony,docteurklein/symfony,Deamon/symfony,paradajozsef/symfony,mnapoli/symfony,arjenm/symfony,garak/symfony,nasimnabavi/symfony,Slamdunk/symfony,iltar/symfony,hacfi/symfony,zcodes/symfony,shieldo/symfony,docteurklein/symfony,1ed/symfony,Nyholm/symfony,dunglas/symfony,jderusse/symfony,curry684/symfony,lyrixx/symfony,jvasseur/symfony,lstrojny/symfony,hacfi/symfony,Tobion/symfony,zerkms/symfony,andreia/symfony,garak/symfony,zcodes/symfony,michaelperrin/symfony,lyrixx/symfony,alekitto/symfony,stof/symfony,mnapoli/symfony,voronkovich/symfony,oleg-andreyev/symfony,jakzal/symfony,dunglas/symfony,smatyas/symfony,d-ph/symfony,apetitpa/symfony,phramz/symfony,Slamdunk/symfony,andrerom/symfony,Koc/symfony,c960657/symfony,joelwurtz/symfony,OskarStark/symfony,fabpot/symfony,OskarStark/symfony,MatTheCat/symfony,gimler/symfony,ragboyjr/symfony,Taluu/symfony,phramz/symfony,jzawadzki/symfony,gnat42/symfony,oleg-andreyev/symfony,jderusse/symfony,vincentaubert/symfony,jean-gui/symfony,chalasr/symfony,fabpot/symfony,gonzalovilaseca/symfony,pierredup/symfony,nasimnabavi/symfony,tgalopin/symfony,arjenm/symfony,jean-gui/symfony,paradajozsef/symfony,nicolas-grekas/symfony,garak/symfony,joelwurtz/symfony,iltar/symfony,iltar/symfony,mpdude/symfony,garak/symfony,symfony/symfony,yceruto/symfony,Taluu/symfony,pyrech/symfony,bendavies/symfony,bendavies/symfony,Tobion/symfony,gencer/symfony,chalasr/symfony,Slamdunk/symfony,d-ph/symfony,ro0NL/symfony,xabbuh/symfony,jzawadzki/symfony,fabpot/symfony,ajgarlag/symfony,mpdude/symfony,weaverryan/symfony,e-moe/symfony,apetitpa/symfony,pierredup/symfony,Taluu/symfony,yceruto/symfony,sgehrig/symfony,Pierstoval/symfony,jean-gui/symfony,derrabus/symfony,Deamon/symfony,zcodes/symfony,kbond/symfony,sgehrig/symfony,alekitto/symfony,ragboyjr/symfony,ajgarlag/symfony,jvasseur/symfony,Taluu/symfony,maidmaid/symfony,fabpot/symfony,damienalexandre/symfony,frankdejonge/symfony,apetitpa/symfony,alekitto/symfony,damienalexandre/symfony,oleg-andreyev/symfony,lstrojny/symfony,MatTheCat/symfony,phramz/symfony,teohhanhui/symfony,damienalexandre/symfony,e-moe/symfony,gonzalovilaseca/symfony,voronkovich/symfony,deguif/symfony,smatyas/symfony,gencer/symfony,Simperfit/symfony,ogizanagi/symfony,Koc/symfony,tgalopin/symfony,hhamon/symfony,weaverryan/symfony,derrabus/symfony,derrabus/symfony,mweimerskirch/symfony,deguif/symfony,MatTheCat/symfony,alekitto/symfony,Einenlum/symfony,andreia/symfony,josephdpurcell/symfony,andreia/symfony,HeahDude/symfony,gnat42/symfony,Simperfit/symfony,arjenm/symfony,jzawadzki/symfony,andrerom/symfony,hacfi/symfony,phramz/symfony,ogizanagi/symfony,tucksaun/symfony,mnapoli/symfony,xabbuh/symfony,mnapoli/symfony,michaelperrin/symfony,jakzal/symfony,oleg-andreyev/symfony,1ed/symfony,yceruto/symfony,sroze/symfony,frankdejonge/symfony,romaricdrigon/symfony,Deamon/symfony,deguif/symfony,sroze/symfony,gonzalovilaseca/symfony,stof/symfony,pyrech/symfony,nasimnabavi/symfony,zerkms/symfony,pyrech/symfony,xabbuh/symfony,Einenlum/symfony,pierredup/symfony,pamil/symfony,teohhanhui/symfony,curry684/symfony,josephdpurcell/symfony,zorn-v/symfony,derrabus/symfony,mweimerskirch/symfony,tgalopin/symfony,paradajozsef/symfony,hhamon/symfony,chalasr/symfony,c960657/symfony,gnat42/symfony,Simperfit/symfony,jakzal/symfony,vincentaubert/symfony,pamil/symfony,shieldo/symfony,Deamon/symfony,shieldo/symfony,maidmaid/symfony,Pierstoval/symfony,ro0NL/symfony,WhiteEagle88/symfony,WhiteEagle88/symfony,HeahDude/symfony,HeahDude/symfony,localheinz/symfony,Deamon/symfony,kbond/symfony,mpdude/symfony,romaricdrigon/symfony,zorn-v/symfony,nicolas-grekas/symfony,dunglas/symfony,zorn-v/symfony,mpdude/symfony,Nyholm/symfony,OskarStark/symfony,tucksaun/symfony,vincentaubert/symfony,hhamon/symfony,docteurklein/symfony,weaverryan/symfony,jvasseur/symfony,gimler/symfony,damienalexandre/symfony,1ed/symfony,kbond/symfony,gonzalovilaseca/symfony,dmaicher/symfony,ajgarlag/symfony,lstrojny/symfony,mweimerskirch/symfony,chalasr/symfony,zerkms/symfony,gimler/symfony,OskarStark/symfony,shieldo/symfony,tucksaun/symfony,sgehrig/symfony,jderusse/symfony,ro0NL/symfony,d-ph/symfony,arjenm/symfony,docteurklein/symfony,voronkovich/symfony,Koc/symfony,xabbuh/symfony,zorn-v/symfony,Koc/symfony,vincentaubert/symfony,stof/symfony,maidmaid/symfony