Update taiki-e/install-action digest to dfcb1ee (#432)

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@0e76c5c569f13f7eb21e8e5b26fe710062b57b62 # v2
+        uses: taiki-e/install-action@dfcb1ee29051d97c8d0f2d437199570008fd5612 # v2
         with:
           tool: cargo-readme
       - name: Run cargo readme