Update taiki-e/install-action digest to 0aa4f22 (#342)

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@8ea32481661d5e04d602f215b94f17e4014b44f9 # v2
+        uses: taiki-e/install-action@0aa4f22591557b744fe31e55dbfcdfea74a073f7 # v2
         with:
           tool: cargo-readme
       - name: Run cargo readme