Fix typos in Makefile and READMEs

Signed-off-by: Stanislav Bogatyrev <stanislav@nspcc.ru>

Makefile

@@ -10,10 +10,10 @@ lint:
 	buf check breaking --against-input '.git#branch=$(BRBR)'
 
 .PHONY: doc
-# Regenerate documentation for protot files:
+# Regenerate documentation for proto files:
 doc:
 	@for f in `find . -type f -name '*.proto' -exec dirname {} \; | sort -u `; do \
-		echo "${B}${G}⇒ Documentation for $$(basename $$f) ${R}"; \
+		echo "⇒ Documentation for $$(basename $$f)"; \
 		protoc \
 			--doc_opt=.github/markdown.tmpl,$${f}.md \
 			--proto_path=.:/usr/local/include \

README.md

@@ -25,7 +25,7 @@ This repository contains:
 - [auto-generated docs](proto-docs) for protocol buffers
 - [manually written docs](docs) for developers (to be done)
 
-# Contributing
+## Contributing
 
 Feel free to contribute to this project after reading the [contributing
 guidelines](CONTRIBUTING.md).
@@ -33,9 +33,7 @@ guidelines](CONTRIBUTING.md).
 Before starting to work on a certain topic, create an new issue first,
 describing the feature/topic you are going to implement.
 
-
 ## License
 
 This project is licensed under the Apache 2.0 License -
 see the [LICENSE](LICENSE) file for details
-