chore: add concurrency to release workflows

Author: olivermeyer

.github/workflows/merge-release.yml

@@ -11,6 +11,10 @@ on:
 permissions:
   contents: read
 
+concurrency:
+  group: ${{ github.workflow }}
+  cancel-in-progress: false
+
 jobs:
   merge-release:
     runs-on: ubuntu-latest

.github/workflows/prepare-release.yml

@@ -11,6 +11,10 @@ on:
 permissions:
   contents: read
 
+concurrency:
+  group: ${{ github.workflow }}
+  cancel-in-progress: false
+
 jobs:
   prepare-release:
     runs-on: ubuntu-latest

.github/workflows/publish-release.yml

@@ -11,6 +11,10 @@ on:
 permissions:
   contents: read
 
+concurrency:
+  group: ${{ github.workflow }}
+  cancel-in-progress: false
+
 jobs:
   publish-release:
     runs-on: ubuntu-latest