Update ci.yml

Author: lalitb

.github/workflows/ci.yml

@@ -201,7 +201,7 @@ jobs:
         with:
           repo-token: ${{ secrets.GITHUB_TOKEN }}
       - name: Install cargo-llvm-cov
-        uses: taiki-e/install-action@33734a118689b0b418824fb78ea2bf18e970b43b
+        uses: taiki-e/install-action@33734a118689b0b418824fb78ea2bf18e970b43b # v2.50.4
         with:
           tool: cargo-llvm-cov
       - name: cargo generate-lockfile
@@ -252,4 +252,4 @@ jobs:
         with:
           tool: cargo-machete
       - name: cargo machete
-        run: cargo machete
+        run: cargo machete