Pin ext-redis version in CI
Pin ext-redis version in CI

Signed-off-by: Alexander M. Turek <b1c1d8736f20db3fb6c1c66bb1455ed43909f0d8@derrabus.de>

nicolas-grekas/symfony,Tobion/symfony,ogizanagi/symfony,symfony/symfony,Tobion/symfony,symfony/symfony,derrabus/symfony,xabbuh/symfony,tucksaun/symfony,ogizanagi/symfony,tucksaun/symfony,damienalexandre/symfony,stof/symfony,curry684/symfony,sgehrig/symfony,derrabus/symfony,nicolas-grekas/symfony,d-ph/symfony,tucksaun/symfony,xabbuh/symfony,hhamon/symfony,ogizanagi/symfony,zerkms/symfony,curry684/symfony,mpdude/symfony,phramz/symfony,mpdude/symfony,curry684/symfony,ro0NL/symfony,mpdude/symfony,nicolas-grekas/symfony,ro0NL/symfony,HeahDude/symfony,zerkms/symfony,symfony/symfony,phramz/symfony,stof/symfony,symfony/symfony,zerkms/symfony,HeahDude/symfony,xabbuh/symfony,tucksaun/symfony,hhamon/symfony,Tobion/symfony,sgehrig/symfony,Tobion/symfony,phramz/symfony,damienalexandre/symfony,damienalexandre/symfony,ro0NL/symfony,paradajozsef/symfony,hhamon/symfony,ro0NL/symfony,mpdude/symfony,d-ph/symfony,paradajozsef/symfony,ogizanagi/symfony,HeahDude/symfony,stof/symfony,sgehrig/symfony,stof/symfony,derrabus/symfony,hhamon/symfony,paradajozsef/symfony,d-ph/symfony,d-ph/symfony,paradajozsef/symfony,zerkms/symfony,curry684/symfony,derrabus/symfony,xabbuh/symfony,phramz/symfony,damienalexandre/symfony,HeahDude/symfony,nicolas-grekas/symfony,sgehrig/symfony