Fix github.ref check for concurrency settings (#241) (#243)

Author: mergify[bot]

.github/workflows/humble-build.yml

@@ -15,9 +15,9 @@ on:
     - cron: '28 6 * * MON-FRI'
 
 concurrency:
-  # cancel previous runs of the same workflow, except for pushes on master branch
+  # cancel previous runs of the same workflow, except for pushes on given branches
   group: ${{ github.workflow }}-${{ github.ref }}
-  cancel-in-progress: ${{ !startsWith(github.ref, '/refs/heads') }}
+  cancel-in-progress: ${{ !startsWith(github.ref, 'refs/heads') }}
 
 jobs:
   binary:

.github/workflows/jazzy-build.yml

@@ -15,9 +15,9 @@ on:
     - cron: '28 6 * * MON-FRI'
 
 concurrency:
-  # cancel previous runs of the same workflow, except for pushes on jazzy branch
+  # cancel previous runs of the same workflow, except for pushes on given branches
   group: ${{ github.workflow }}-${{ github.ref }}
-  cancel-in-progress: ${{ !startsWith(github.ref, '/refs/heads') }}
+  cancel-in-progress: ${{ !startsWith(github.ref, 'refs/heads') }}
 
 jobs:
   binary:

.github/workflows/rolling-build.yml

@@ -15,9 +15,9 @@ on:
     - cron: '28 6 * * MON-FRI'
 
 concurrency:
-  # cancel previous runs of the same workflow, except for pushes on master branch
+  # cancel previous runs of the same workflow, except for pushes on given branches
   group: ${{ github.workflow }}-${{ github.ref }}
-  cancel-in-progress: ${{ !startsWith(github.ref, '/refs/heads') }}
+  cancel-in-progress: ${{ !startsWith(github.ref, 'refs/heads') }}
 
 jobs:
   binary: