Revert "fix(ci): add explicit origin to fix release detached head"

This reverts commit b1b9549.

Author: heitorlessa

.github/workflows/reusable_publish_changelog.yml

@@ -6,9 +6,6 @@ on:
 permissions:
   contents: write
 
-env:
-  GIT_ORIGIN: https://github.com/awslabs/aws-lambda-powertools-python
-
 jobs:
   publish_changelog:
     # Force Github action to run only a single job at a time (based on the group name)
@@ -21,17 +18,12 @@ jobs:
         uses: actions/checkout@v3
         with:
           fetch-depth: 0
-      - name: Git client setup
+      - name: Git client setup and refresh tip
         run: |
           git config user.name "Release bot"
           git config user.email "aws-devax-open-source@amazon.com"
           git config pull.rebase true
-      - name: Git references setup and refresh
-        # `release` event trigger uses DETACHED Head instead of trunk like all other events
-        # so we need to explicitly configure it
-        run: |
-          git remote add origin ${GIT_ORIGIN}
-          git pull origin develop --rebase
+          git pull --rebase
       - name: "Generate latest changelog"
         run: make changelog
       - name: Update Changelog in trunk