Update mheap/github-action-required-labels action to v5 (#432)

.github/renovate.json

@@ -1,16 +1,13 @@
 {
-  "extends": [
-    "config:base"
-  ],
-  "labels": [
-    "changelog: skip",
-    "dependencies"
-  ],
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+  "extends": ["config:base"],
+  "labels": ["changelog: skip", "dependencies"],
   "packageRules": [
     {
       "groupName": "github-actions",
       "matchManagers": ["github-actions"],
       "separateMajorMinor": "false"
     }
-  ]
+  ],
+  "schedule": ["on the first day of the month"]
 }

.github/workflows/require-pr-label.yml

@@ -12,7 +12,7 @@ jobs:
       issues: write
 
     steps:
-      - uses: mheap/github-action-required-labels@v4
+      - uses: mheap/github-action-required-labels@v5
         with:
           mode: minimum
           count: 1