fix(ci): configure git authentication for automated OpenAPI sync

Add git URL rewrite configuration to use GitHub token for authentication
when pushing changes in the OpenAPI sync workflow. This fixes the
"could not read Username" error that occurred when the workflow attempted
to push to the remote repository.

The actions/checkout action cleans up authentication after checkout, so
we need to explicitly configure git to use the token for push operations.

Author: jdalton

.github/workflows/generate.yml

@@ -74,9 +74,13 @@ jobs:
 
       - name: Configure git
         if: steps.fetch.outputs.changed == 'true' || github.event.inputs.force == 'true'
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         run: |
           git config --global user.name "github-actions[bot]"
           git config --global user.email "github-actions[bot]@users.noreply.github.com"
+          # Configure git to use the GitHub token for authentication
+          git config --global url."https://x-access-token:${GH_TOKEN}@github.com/".insteadOf "https://github.com/"
 
       - name: Check for changes
         id: check