Update workflow to sync master with develop branch

Author: iMattPro

.github/workflows/merge-master-to-4.0.yml …ub/workflows/merge-master-to-develop.yml.github/workflows/merge-master-to-4.0.yml renamed to .github/workflows/merge-master-to-develop.yml .github/workflows/merge-master-to-4.0.yml renamed to .github/workflows/merge-master-to-develop.yml

@@ -1,4 +1,4 @@
-name: Sync dev/4.0
+name: Sync develop branch
 
 on:
     push:
@@ -9,7 +9,7 @@ on:
 
 env:
     SYNC_SOURCE_BRANCH: master
-    SYNC_TARGET_BRANCH: dev/4.0
+    SYNC_TARGET_BRANCH: develop
 
 permissions:
     contents: write
@@ -20,15 +20,15 @@ concurrency:
 
 jobs:
     sync-dev-branch:
-        name: Merge master into dev/4.0
+        name: Merge master into develop branch
         # Keep this named after the GitHub repository.
         # GitHub Actions does not allow workflow env values in jobs.<job_id>.if.
         if: github.repository == 'phpbb-extensions/phpbb-ext-skeleton' && github.event.repository.fork == false
         runs-on: ubuntu-latest
 
         steps:
             - name: Check out repository
-              uses: actions/checkout@v4
+              uses: actions/checkout@v6
               with:
                   fetch-depth: 0