ci: update release-please workflow to use default github token and allow manual triggering (#4597) (#4598)

* Initial plan

* Update release-please.yml to use secrets.GITHUB_TOKEN

Co-authored-by: NoopDog <[email protected]>

---------

Co-authored-by: copilot-swe-agent[bot] <[email protected]>
Co-authored-by: NoopDog <[email protected]>

Author: Copilot

.github/workflows/release-please.yml

@@ -2,6 +2,7 @@ on:
   push:
     branches:
       - main
+  workflow_dispatch: # Enable manual triggering
 
 permissions:
   contents: write
@@ -17,8 +18,4 @@ jobs:
         id: release
         with:
           config-file: release-please-config.json
-          # this assumes that you have created a personal access token
-          # (PAT) and configured it as a GitHub action secret named
-          # `MY_RELEASE_PLEASE_TOKEN` (this secret name is not important).
-          token: ${{ secrets.HCA_RELEASE_PLEASE_TOKEN }}
-          # This is a built-in strategy in release-please, see "Action Inputs" for more options
+          token: ${{ secrets.GITHUB_TOKEN }}