message: Fix proto/README.md typo
diff: @@ -6,7 +6,7 @@ Collection of all Backstage protobuf definitions.
  Managed with prototool, install instructions at https://github.com/uber/prototool/blob/dev/docs/install.md
  -## Install Depenedencies
  +## Install Dependencies
  You will need to have `protoc-gen-go` available in your path. You can find out more information here: https://github.com/golang/protobuf
  