fix(actions): never run mirroring and Docker images build on forks (#1537)

Author: aeiouaeiouaeiouaeiouaeiouaeiou

.github/workflows/build.yaml

@@ -13,9 +13,10 @@ jobs:
 
         # 'push' runs on inner branches, 'pull_request' will run only on outer PRs
         if: >
-          github.event_name == 'push'
+          github.repository_owner == 'OpenVK'
+          && (github.event_name == 'push'
           || (github.event_name == 'pull_request'
-              && github.event.pull_request.head.repo.full_name != github.repository)
+              && github.event.pull_request.head.repo.full_name != github.repository))
 
         steps:
             - name: Set up QEMU

.github/workflows/codeberg-mirror.yml

@@ -5,6 +5,7 @@ on: push
 jobs:
   to_codeberg:
     runs-on: ubuntu-latest
+    if: github.repository_owner == 'OpenVK'
     steps:
       - uses: actions/checkout@v2
         with: