Add auto-release label (#16320)

* Added auto-release label

* Update auto-release label color

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Update auto-release label description

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Apply suggestion from @jsquire

Co-authored-by: Jesse Squire <jesse.squire@gmail.com>

---------

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Co-authored-by: Jesse Squire <jesse.squire@gmail.com>

Author: 3 people

tools/github/data/common-labels.csv

@@ -281,6 +281,7 @@ architecture-review-added,Architecture review completed,0e8a16
 architecture-review-in-progress,Architecture review is in progress,fbca04
 architecture-review-needed,Triggers Archie: AI architecture review agent,1d76db
 auto-close-exempt,Prevents the auto-close from closing based on max lifetime,ededed
+auto-release,"When merged to main, the release pipelines for this PR's changed packages are triggered automatically.",1d76db
 blocking-release,Blocks release,d73a49
 breaking-change,,d73a49
 bug,This issue requires a change to an existing behavior in the product in order to be resolved.,eaa875