ci: Use taiki-e/github-actions/install-rust action

taiki-e/github-actions@3d23ff7

.github/workflows/ci.yml

@@ -62,9 +62,11 @@ jobs:
     timeout-minutes: 60
     steps:
       - uses: taiki-e/checkout-action@v1
-      - name: Install Rust
-        run: rustup toolchain add "${{ matrix.rust }}" --no-self-update --component rust-src && rustup default "${{ matrix.rust }}"
-      - run: rustup target add thumbv6m-none-eabi
+      - uses: taiki-e/github-actions/install-rust@main
+        with:
+          toolchain: ${{ matrix.rust }}
+          component: rust-src
+          target: thumbv6m-none-eabi
       - uses: taiki-e/install-action@cargo-hack
       - uses: taiki-e/install-action@cargo-minimal-versions
       - uses: taiki-e/install-action@cargo-careful
@@ -88,7 +90,6 @@ jobs:
     timeout-minutes: 60
     steps:
       - uses: taiki-e/checkout-action@v1
-      - name: Install Rust
-        run: rustup toolchain add nightly --no-self-update && rustup default nightly
+      - uses: taiki-e/github-actions/install-rust@nightly
       - run: tools/gen.sh
       - run: git add -N . && git diff --exit-code