fix linux github actions

Author: timlegge

.github/workflows/linux.yml

@@ -1,8 +1,14 @@
 name: linux
 
 on:
-  - push
-
+  push:
+    branches:
+      - '*'
+    tags-ignore:
+      - '*'
+  pull_request:
+    branches:
+      - '*'
 jobs:
   perl:
     runs-on: ubuntu-latest