Update taiki-e/install-action digest to ae9d9ea (#198)

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@995f97569c4a8ae84dcd7e1a0107f65ca6ebf139 # v2
+        uses: taiki-e/install-action@ae9d9ea210235f03e365c28f43504df735a511be # v2
         with:
           tool: cargo-readme
       - name: Run cargo readme