Test Windows build with extensions

.github/workflows/release.yml

@@ -56,7 +56,7 @@ jobs:
           - target: x86_64-pc-windows-msvc
             os: windows-latest
             extension: .exe
-            flags: --no-default-features
+            flags: --no-default-features -F extensions
     runs-on: ${{ matrix.os }}
     steps:
       - name: Checkout the repo
@@ -72,6 +72,11 @@ jobs:
         name: Install protoc
         run: sudo apt update && sudo apt install -y protobuf-compiler
 
+      - if: ${{ runner.os == 'Windows' }}
+        name: Install protoc
+        # TODO: Replace this with something that isn't a 3rd-party action
+        uses: arduino/setup-protoc@v3
+
       - if: ${{ runner.os == 'Windows' }}
         name: Install Rust toolchain
         run: rustup toolchain install stable --profile minimal --target ${{ matrix.target }}