Update README.md, CHANGELOG.md

Author: shaldengeki

CHANGELOG.md

@@ -108,6 +108,8 @@ END_UNRELEASED_TEMPLATE
     * 3.14.0b3
 * (gazelle) New directive `gazelle:python_generate_proto`; when `true`,
   Gazelle generates `py_proto_library` rules for `proto_library`. `false` by default.
+* (gazelle) New directive `gazelle:python_proto_naming_convention`; controls
+  naming of `py_proto_library` rules. See `gazelle/README.md`.
 
 {#v0-0-0-removed}
 ### Removed

gazelle/README.md

@@ -208,6 +208,8 @@ Python-specific directives are as follows:
 | Controls the `py_binary` naming convention. Follows the same interpolation rules as `python_library_naming_convention`.                                                                                                                                                                         | |
 | `# gazelle:python_test_naming_convention`                                                                                                                                                                                                                                                       | `$package_name$_test` |
 | Controls the `py_test` naming convention. Follows the same interpolation rules as `python_library_naming_convention`.                                                                                                                                                                           | |
+| `# gazelle:python_proto_naming_convention`                                                                                                                                                                                                                                                       | `$proto_name$_py_pb2` |
+| Controls the `py_proto_library naming convention. It interpolates `$proto_name$` with the proto_library rule name, minus any trailing _proto. E.g. if the proto_library name is `foo_proto`, setting this to `$proto_name$_my_lib` would render to `foo_my_lib`.                                                                                                                                                                          | |
 | `# gazelle:resolve py ...`                                                                                                                                                                                                                                                                      | n/a |
 | Instructs the plugin what target to add as a dependency to satisfy a given import statement. The syntax is `# gazelle:resolve py import-string label` where `import-string` is the symbol in the python `import` statement, and `label` is the Bazel label that Gazelle should write in `deps`. | |
 | [`# gazelle:python_default_visibility labels`](#directive-python_default_visibility)                                                                                                                                                                                                            | |