Simplify condition

Author: christophfroehlich

.github/workflows/humble-pre-release.yml

@@ -28,7 +28,7 @@ env:
 jobs:
   default:
     if: |
-      (github.event_name == 'pull_request' && (contains(github.event.label.name, 'check-prerelease') || contains(github.event.label.name, 'check-prerelease-downstream'))) ||
+      (github.event_name == 'pull_request' && contains(github.event.label.name, 'check-prerelease')) ||
       (github.event_name == 'workflow_dispatch')
     runs-on: ubuntu-latest
     steps:

.github/workflows/jazzy-pre-release.yml

@@ -23,7 +23,7 @@ env:
 jobs:
   default:
     if: |
-      (github.event_name == 'pull_request' && (contains(github.event.label.name, 'check-prerelease') || contains(github.event.label.name, 'check-prerelease-downstream'))) ||
+      (github.event_name == 'pull_request' && contains(github.event.label.name, 'check-prerelease')) ||
       (github.event_name == 'workflow_dispatch')
     runs-on: ubuntu-latest
     steps:

.github/workflows/rolling-pre-release.yml

@@ -20,7 +20,7 @@ on:
 jobs:
   default:
     if: |
-      (github.event_name == 'pull_request' && (contains(github.event.label.name, 'check-prerelease') || contains(github.event.label.name, 'check-prerelease-downstream'))) ||
+      (github.event_name == 'pull_request' && contains(github.event.label.name, 'check-prerelease')) ||
       (github.event_name == 'workflow_dispatch')
 
     strategy: