Fix Windows build missing CC.

.github/workflows/release-1-test-tag.yml

@@ -16,6 +16,12 @@ jobs:
     name: test (${{ matrix.os }})
     runs-on: ${{ matrix.os }}
     steps:
+        - if: matrix.os == 'windows-latest'
+          name: Install LLVM CC
+          uses: KyleMayes/install-llvm-action@v2
+          with:
+            version: "16"
+            env: true
         - uses: actions/checkout@v4
           with:
             ref: release

.github/workflows/release-2-prebuild-publish.yml

@@ -20,6 +20,13 @@ jobs:
     name: prebuild (${{ matrix.os }})
     runs-on: ${{ matrix.os }}
     steps:
+        - if: matrix.os == 'windows-latest'
+          name: Install LLVM CC
+          uses: KyleMayes/install-llvm-action@v2
+          with:
+            version: "16.0.6"
+            env: true
+
         - uses: actions/checkout@v4
           with:
             ref: release