Try

.gitea/workflows/runbook.yml

@@ -13,10 +13,10 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v3
 
-      - name: Copy base64 encoded SSH key to file to a temp file
+      - name: Copy base64 encoded SSH key to file to a temp file and dont decode it
         run: |
-          echo "${{ secrets.ANSIBLE_SSH_KEY }}" | /tmp/id_rsa.b64
+          echo "${{ secrets.SSH_PRIVATE_KEY }}" > /tmp/id_rsa.b64
 
-      - name: cat the SSH key
+      - name: cat the base64 SSH key
         run: |
           cat /tmp/id_rsa.b64