Update taiki-e/install-action digest to f13d8e1 (#371)

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@5b5de1b4da26ad411330c0454bdd72929bfcbeb2 # v2
+        uses: taiki-e/install-action@f13d8e15c52b25c79b608d399cc802adc73d83da # v2
         with:
           tool: cargo-readme
       - name: Run cargo readme