Minor fixes to new rake tasks content

doc/development/rake_tasks.md

@@ -232,7 +232,7 @@ bundle exec rake gitlab:graphql:compile_docs
 In its current state, the rake task:
 
 - Generates output for GraphQL objects.
-- Places the output at `docs/api/graphql/reference/index.md`.
+- Places the output at `doc/api/graphql/reference/index.md`.
 
 This uses some features from `graphql-docs` gem like its schema parser and helper methods.
 The docs generator code comes from our side giving us more flexibility, like using Haml templates and generating Markdown files.
@@ -241,5 +241,5 @@ To edit the template used, please take a look at `lib/gitlab/graphql/docs/templa
 The actual renderer is at `Gitlab::Graphql::Docs::Renderer`.
 
 `@parsed_schema` is an instance variable that the `graphql-docs` gem expects to have available.
-`Gitlab::Graphql::Docs::Helper` defines the `object` method we currently use. This is also where you should implement any
-new methods for new types you'd like to display.
+`Gitlab::Graphql::Docs::Helper` defines the `object` method we currently use. This is also where you
+should implement any new methods for new types you'd like to display.