Update taiki-e/install-action digest to 3fc1605 (#214)

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@019e22100565643c6890fe3f00da0b63017c1672 # v2
+        uses: taiki-e/install-action@3fc1605ecf43c14c7dd5ac06a4a629031ed3bdbd # v2
         with:
           tool: cargo-readme
       - name: Run cargo readme