docs: proto required version to 3.15 to support optionals
@@ -59,7 +59,7 @@ git clone --recurse-submodules https://github.com/determined-ai/determined.git
- NPM (>= 8)
- Docker (>= 19.03)
- Helm (>= 3.0.0)
-- protobuf-compiler (>= 3.0)
+- protobuf-compiler (>= 3.15)
- Java (>= 7)
- cURL (>= 7)
- jq (>= 1.6)
