Update taiki-e/install-action digest to 2db3465 (#247)

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@d4635f2de61c8b8104d59cd4aede2060638378cc # v2
+        uses: taiki-e/install-action@2db346588ecc179293df26b2f8dcc61d3b3ecc40 # v2
         with:
           tool: cargo-readme
       - name: Run cargo readme