Update taiki-e/install-action digest to d028bcc (#285)

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@2383334cf567d78771fc7d89b6b3802ef1412cf6 # v2
+        uses: taiki-e/install-action@d028bcc176afad59ee1e0b7dbba9789b8a1421f8 # v2
         with:
           tool: cargo-readme
       - name: Run cargo readme