Install rustfmt as part of the build (#3772)

Author: kennykerr

.github/workflows/fmt.yml

@@ -22,5 +22,7 @@ jobs:
         uses: actions/checkout@v5
       - name: Update toolchain
         run: rustup update --no-self-update stable && rustup default stable
+      - name: Install rustfmt
+        run: rustup component add rustfmt
       - name: Check
         run: cargo fmt --all -- --check

.github/workflows/gen.yml

@@ -26,6 +26,8 @@ jobs:
         uses: actions/checkout@v5
       - name: Update toolchain
         run: rustup update --no-self-update stable && rustup default stable
+      - name: Install rustfmt
+        run: rustup component add rustfmt
       - name: Run
         run: cargo run -p tool_${{ matrix.tool }} --release
       - name: Check