Update taiki-e/install-action digest to a533731

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@d2347103f7c028229cc9c9c440e90b572dd50592 # v2
+        uses: taiki-e/install-action@a533731dca077df9a3f937b9dcafcf679010d002 # v2
         with:
           tool: cargo-readme
       - name: Run cargo readme