* Correcting name of concept 'Container Enviorment Variables'
This page discusses the container environment and container environment variables are part of it. So removing a 'variable' word to make it more correct.
* Correcting references
Correcting references
* Correcting reference links
Correcting reference links
The changes are in line with one of the request for documentation update as per PR #55807 wherein it was observed that the preStop hook is not commissioned when the container is already in the terminated or completed state.
Braces removed as per the review comment. Multiple commits squashed
Braces removed as per the review comment
Update as per review, removed etc... and the statement is now cleaner