Update taiki-e/install-action digest to d0f4f69 (#355)

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@5ab30948b991e8d6aa5a6c1e33c6aea130c6de65 # v2
+        uses: taiki-e/install-action@d0f4f69b07c0804d1003ca9a5a5f853423872ed9 # v2
         with:
           tool: cargo-readme
       - name: Run cargo readme