Fix API_REFERENCE_PREFIX to use dev-- for push events (mlflow#19137)

Signed-off-by: Harutaka Kawamura <[email protected]>
Co-authored-by: copilot-swe-agent[bot] <[email protected]>
Co-authored-by: harupy <[email protected]>
Co-authored-by: Harutaka Kawamura <[email protected]>

Author: Copilot

.github/workflows/docs.yml

@@ -68,10 +68,24 @@ jobs:
       - uses: ./.github/actions/show-versions
       - run: |
           npm run convert-notebooks
+      - name: Set alias
+        id: alias
+        env:
+          EVENT_NAME: ${{ github.event_name }}
+          PR_NUMBER: ${{ github.event.pull_request.number }}
+        run: |
+          if [ "$EVENT_NAME" = "push" ]; then
+            ALIAS="dev"
+          else
+            ALIAS="pr-$PR_NUMBER"
+          fi
+          echo "value=$ALIAS" >> $GITHUB_OUTPUT
+          echo "$ALIAS" > /tmp/alias.txt
+          cat /tmp/alias.txt
       - name: Build docs
         env:
           GTM_ID: "GTM-TEST"
-          API_REFERENCE_PREFIX: https://pr-${{ github.event.pull_request.number }}--mlflow-docs-preview.netlify.app/docs/
+          API_REFERENCE_PREFIX: https://${{ steps.alias.outputs.value }}--mlflow-docs-preview.netlify.app/docs/
         run: |
           npm run build-all -- --no-r --use-npm
       - name: Check API inventory
@@ -105,17 +119,6 @@ jobs:
 
       # `github.event.workflow_run.pull_requests` is empty when a PR is created from a fork:
       # https://github.com/orgs/community/discussions/25220#discussioncomment-11001085
-      - name: Save alias
-        env:
-          EVENT_NAME: ${{ github.event_name }}
-          PR_NUMBER: ${{ github.event.pull_request.number }}
-        run: |
-          if [ "$EVENT_NAME" = "push" ]; then
-            echo "dev" > /tmp/alias.txt
-          else
-            echo "pr-$PR_NUMBER" > /tmp/alias.txt
-          fi
-          cat /tmp/alias.txt
       - uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
         with:
           name: alias