Fix gRPC Maven Central URL template separator

Maven Central uses hyphens for all separators in gRPC binaries:
- Wrong: protoc-gen-grpc-java-1.68.1-linux_x86_64.exe
- Correct: protoc-gen-grpc-java-1.68.1-linux-x86_64.exe

This fixes GitLab CI failures on Linux x86_64

Author: evg-tso

src/leiningen/protodeps.clj

@@ -251,7 +251,7 @@ and include this full error message to add support for your platform."
 (def new-protoc-release-tpl "https://github.com/protocolbuffers/protobuf/releases/download/v${:minor}.${:patch}/protoc-${:minor}.${:patch}-${:os-name}-${:os-arch}.zip")
 
 
-(def grpc-release-tpl "https://repo1.maven.org/maven2/io/grpc/protoc-gen-grpc-java/${:version}/protoc-gen-grpc-java-${:version}-${:os-name}_${:os-arch}.exe")
+(def grpc-release-tpl "https://repo1.maven.org/maven2/io/grpc/protoc-gen-grpc-java/${:version}/protoc-gen-grpc-java-${:version}-${:os-name}-${:os-arch}.exe")
 
 
 (defn- protoc-release-template [{:keys [protoc-zip-url-template]}