ci: fetch full history on Windows so build.rs embeds git SHA

.github/workflows/ci.yml

@@ -56,6 +56,8 @@ jobs:
     runs-on: windows-latest
     steps:
       - uses: actions/checkout@v6
+        with:
+          fetch-depth: 0
       - uses: dtolnay/rust-toolchain@stable
       - uses: Swatinem/rust-cache@v2
       - name: build