Create workflow

.github/workflows/verify-data.yml

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+name: 'Verify data'
+
+on:
+  pull_request:
+    branches: [ "main" ]
+
+jobs:
+ yamllint:
+    name: 'YAML lint'
+    runs-on: ubuntu-latest
+    steps:
+      - name: 'Checkout'
+        uses: actions/checkout@v4
+
+      - name: 'YAML lint'
+        uses: karancode/yamllint-github-action@master
+        with:
+          yamllint_file_or_dir: 'data'
+          yamllint_strict: false
+          yamllint_comment: false

.yamllint

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+---
+
+rules:
+  anchors: enable
+  braces: enable
+  brackets: enable
+  colons: enable
+  commas: enable
+  comments:
+    level: warning
+  comments-indentation:
+    level: warning
+  document-end: disable
+  document-start:
+    level: warning
+  empty-lines: enable
+  empty-values: disable
+  float-values: disable
+  hyphens: enable
+  indentation: enable
+  key-duplicates: enable
+  key-ordering: disable
+  line-length: disable
+  new-line-at-end-of-file: enable
+  new-lines: enable
+  octal-values: disable
+  quoted-strings: disable
+  trailing-spaces: enable
+  truthy:
+    level: warning