avoid runnign if requirements is modified

.gitea/workflows/dockerfile_runner.yaml

@@ -2,6 +2,8 @@ name: Gitea Actions Demo
 run-name: ${{ gitea.actor }} is testing out Gitea Actions 🚀
 on:
   push:
+  paths-ignore:
+    - 'requirements.txt'
   issue_comment:
     types: [created]