Update taiki-e/install-action digest (#576)

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@7a79fe8c3a13344501c80d99cae481c1c9085912 # v2
+        uses: taiki-e/install-action@15449e3094499af05d8d964a1c884208e4b8b595 # v2
         with:
           tool: cargo-readme
       - name: Run cargo readme
@@ -49,7 +49,7 @@ jobs:
       - uses: dtolnay/rust-toolchain@3c5f7ea28cd621ae0bf5283f0e981fb97b8a7af9 # master
         with:
           toolchain: ${{ matrix.rust-version }}
-      - uses: taiki-e/install-action@11c82bec3ad7f6041db8bd552d47469a973381cd # nextest
+      - uses: taiki-e/install-action@15bf0f5fb5fbf65baca08c0bff781d0aa29fbdcf # nextest
       - uses: Swatinem/rust-cache@23bce251a8cd2ffc3c1075eaa2367cf899916d84 # v2
       - name: Build
         run: cargo build --all-features