GHA: Fix push + PR

see https://github.community/t/how-to-factor-paths-in-common-for-push-and-pull-request/115967/2

TL;DR:  There is no way to specify the common paths for two events

.github/workflows/test.yml

@@ -1,6 +1,7 @@
 name: testssl.sh CI
 
-on: [push, pull_request]
+on:
+  push:
     paths-ignore:
       - 'utils/**'
       - 'docs/**'
@@ -11,6 +12,16 @@ on: [push, pull_request]
       - '**.html'
       - 'LICENSE'
       - 'Dockerfile'
+    pull_request:
+      - 'utils/**'
+      - 'docs/**'
+      - 'bin/**'
+      - '**.md'
+      - '**.pem'
+      - '**.pdf'
+      - '**.html'
+      - 'LICENSE'
+      - 'Dockerfile'
 
 jobs:
   build: