Improvements to the contribution guide (#12086)
Improvements to the contribution guide (#12086)

* Fix typo in contribution guide

* Improve contributing links and wording

Various improvements to the contributor's guide, including grammar fixes, making common links for easier updating, and fix for a broken link to VS Code editor documentation.

* Update .github/CONTRIBUTING.md

Co-authored-by: Travis Plunk <e53dc036b64d8c36746dbcee7c7c871931c99dd6@microsoft.com>
PaulHigin/PowerShell,daxian-dbw/PowerShell,daxian-dbw/PowerShell,daxian-dbw/PowerShell,daxian-dbw/PowerShell,PaulHigin/PowerShell,PaulHigin/PowerShell,JamesWTruher/PowerShell-1,TravisEz13/PowerShell,TravisEz13/PowerShell,PaulHigin/PowerShell,JamesWTruher/PowerShell-1,JamesWTruher/PowerShell-1,TravisEz13/PowerShell,TravisEz13/PowerShell,JamesWTruher/PowerShell-1