Update taiki-e/install-action digest to 5651179 (#237)

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@914ac1e29db2d22aef69891f032778d9adc3990d # v2
+        uses: taiki-e/install-action@5651179950649c44da31d346537e20c0534f0f25 # v2
         with:
           tool: cargo-readme
       - name: Run cargo readme