Update taiki-e/install-action digest to f176c07 (#459)

Author: nextest-bot

.github/workflows/ci.yml

@@ -25,7 +25,7 @@ jobs:
       - name: Lint (rustfmt)
         run: cargo xfmt --check
       - name: Install cargo readme
-        uses: taiki-e/install-action@4573997e3b6c0fbc22f7acab193b00a8a3ca817d # v2
+        uses: taiki-e/install-action@f176c07a0a40cbfdd08ee9aa8bf1655701d11e69 # v2
         with:
           tool: cargo-readme
       - name: Run cargo readme