Update taiki-e/install-action digest to e5f8d33 (#339)

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@cc60de1d6831d7e9c4342f618ce7a5d6a9f223a4 # v2
+        uses: taiki-e/install-action@e5f8d33e7166e0491b2ab4ff0567cc6cd6772737 # v2
         with:
           tool: cargo-readme
       - name: Run cargo readme