ci: Update checkout reference for doc deployment

I had previously left the reference branch set from earlier testing by mistake. This update ensures that the action now runs from the branch that triggered the workflow.

Author: ShahanaFarooqui

.github/workflows/docs-action.yml

@@ -27,7 +27,7 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v4
         with:
-          ref: testing-doc-snippets
+          ref: ${{ github.ref }}
           token: ${{ secrets.GITHUB_TOKEN }}
           fetch-depth: 0