Update taiki-e/install-action digest to 7348990

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@18ab6bde9dca8a1b7ffc34d915c2c21a581e253a # v2
+        uses: taiki-e/install-action@7348990d6a11d92f3e482c9b1bb48cf31ab7f658 # v2
         with:
           tool: cargo-readme
       - name: Run cargo readme