Update taiki-e/install-action digest to cf46383 (#406)

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@50708e9ba8d7b6587a2cb575ddaa9a62e927bc06 # v2
+        uses: taiki-e/install-action@cf46383a970594553a83cc6140075ef6a7f54dee # v2
         with:
           tool: cargo-readme
       - name: Run cargo readme