Update taiki-e/install-action digest to 4a27a04

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@dea01ef82668860268124c141f462e3f92ef86ff # v2
+        uses: taiki-e/install-action@4a27a04f8a48ceb6b30a8541bae8994ce2ea4dd7 # v2
         with:
           tool: cargo-readme
       - name: Run cargo readme