add GH job to remove reference.txt

.github/workflows/docs.yml

@@ -1,12 +1,34 @@
 name: Docs
 
 on:
-  workflow_dispatch: 
+  workflow_dispatch:
   push:
     tags:
       - '[0-9]+.[0-9]+.[0-9]+*'
 
 jobs:
+  update_ref:
+    runs-on: ubuntu-latest
+
+    if: startsWith( github.ref, 'refs/tags/')
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+        with:
+          ref: master
+
+      - name: "remove API reference commit SHA"
+        run: rm -rf reference.txt
+        continue-on-error: true
+
+      - uses: stefanzweifel/git-auto-commit-action@v4
+        with:
+          commit_message: "TASK: Updating API ref SHA"
+          commit_user_name: automation-commercetools
+          commit_user_email: [email protected]
+          commit_author: Auto Mation <[email protected]>
+
   unittests:
     name: Build Docs