tools/github actions: move url checks to a separate workflow

- schedule at same time as the daily metadata update workflow

.github/workflows/daily-update-metadata.yml

@@ -25,9 +25,3 @@ jobs:
           git add software/ tags/ platforms/ licenses*.yml
           git diff-index --quiet HEAD || git commit -m "[bot] update projects metadata"
           git push
-
-  url-check:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v3
-      - run: make url_check

.github/workflows/daily-url-check.yml

@@ -0,0 +1,18 @@
+on:
+  schedule:
+    - cron: '22 22 * * *'
+  workflow_dispatch:
+
+env:
+  GITHUB_TOKEN: ${{secrets.GITHUB_TOKEN}}
+
+concurrency:
+  group: ${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  url-check:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - run: make url_check