Update taiki-e/install-action digest to ee4bbcf (#227)

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@03351cfd91ee8253b66020be1ad81991e6ba3502 # v2
+        uses: taiki-e/install-action@ee4bbcf4435ec17764691a03c6a9604d87c25062 # v2
         with:
           tool: cargo-readme
       - name: Run cargo readme