ci: Use uv tool instead of venv

Author: encounter

.github/workflows/build.yaml

@@ -146,13 +146,12 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v4
+      - name: Install uv
+        if: matrix.build == 'zigbuild'
+        uses: astral-sh/setup-uv@v6
       - name: Install cargo-zigbuild
         if: matrix.build == 'zigbuild'
-        run: |
-          python3 -m venv .venv
-          . .venv/bin/activate
-          echo PATH=$PATH >> $GITHUB_ENV
-          pip install ziglang==0.13.0.post1 cargo-zigbuild==0.19.8
+        run: uv tool install cargo-zigbuild==0.20.1 --with ziglang==0.15.1
       - name: Setup Rust toolchain
         uses: dtolnay/rust-toolchain@stable
         with:
@@ -213,13 +212,12 @@ jobs:
           sudo apt-get -y install ${{ matrix.packages }}
       - name: Checkout
         uses: actions/checkout@v4
+      - name: Install uv
+        if: matrix.build == 'zigbuild'
+        uses: astral-sh/setup-uv@v6
       - name: Install cargo-zigbuild
         if: matrix.build == 'zigbuild'
-        run: |
-          python3 -m venv .venv
-          . .venv/bin/activate
-          echo PATH=$PATH >> $GITHUB_ENV
-          pip install ziglang==0.13.0.post1 cargo-zigbuild==0.19.8
+        run: uv tool install cargo-zigbuild==0.20.1 --with ziglang==0.15.1
       - name: Setup Rust toolchain
         uses: dtolnay/rust-toolchain@stable
         with: