internal: checkout repo before run typos

Author: Young-Flash

.github/workflows/ci.yaml

@@ -226,6 +226,11 @@ jobs:
       - name: download typos
         run: curl -LsSf https://github.com/crate-ci/typos/releases/download/$TYPOS_VERSION/typos-$TYPOS_VERSION-x86_64-unknown-linux-musl.tar.gz | tar zxf - -C ${CARGO_HOME:-~/.cargo}/bin
 
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          ref: ${{ github.event.pull_request.head.sha }}
+
       - name: check for typos
         run: typos