chore(deps): update taiki-e/install-action digest to 470679b

Author: renovate[bot]

.github/workflows/rust.yml

@@ -41,7 +41,7 @@ jobs:
           key: test
           save-if: ${{ github.ref_name == 'main' }}
       - name: Install llvm-cov and nextest
-        uses: taiki-e/install-action@71b48393496777ee11188c07a34d48b048a985cd # v2
+        uses: taiki-e/install-action@470679bc3a1580072dac4e67535d1aa3a3dcdf51 # v2
         with:
           tool: cargo-llvm-cov,cargo-nextest
       - name: Test