Update taiki-e/install-action digest to 02a70f7 (#333)

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@1dd4d60a583436c5738af3d204f159f44d92f704 # v2
+        uses: taiki-e/install-action@02a70f78546855f81cbc7be43a54a4965d769f54 # v2
         with:
           tool: cargo-readme
       - name: Run cargo readme