fix github info

.github/workflows/deploy.yaml

@@ -10,6 +10,8 @@ jobs:
     runs-on: ubuntu-18.04
     steps:
       - uses: actions/checkout@v2
+        with:
+          fetch-depth: 0    # Fetch all history for .GitInfo and .Lastmod
 
       - name: Build Link Index
         uses: jackyzha0/hugo-obsidian@v2.12