Fix various spelling errors in FE graphql docs

doc/development/fe_guide/graphql.md

@@ -15,11 +15,11 @@
 - [🎬 GraphQL at GitLab: Deep Dive](../api_graphql_styleguide.md#deep-dive) (video) by Nick Thomas
   - An overview of the history of GraphQL at GitLab (not frontend-specific)
 - [🎬 GitLab Feature Walkthrough with GraphQL and Vue Apollo](https://www.youtube.com/watch?v=6yYp2zB7FrM) (video) by Natalia Tepluhina
-  - A real-life example of implmenting a frontend feature in GitLab using GraphQL
+  - A real-life example of implementing a frontend feature in GitLab using GraphQL
 - [🎬 History of client-side GraphQL at GitLab](https://www.youtube.com/watch?v=mCKRJxvMnf0) (video) Illya Klymov and Natalia Tepluhina
 - [🎬 From Vuex to Apollo](https://www.youtube.com/watch?v=9knwu87IfU8) (video) by Natalia Tepluhina
   - A useful overview of when Apollo might be a better choice than Vuex, and how one could go about the transition
-- [🛠 Vuex-> Apollo Migration: a proof-of-concept project](https://gitlab.com/ntepluhina/vuex-to-apollo/blob/master/README.md)
+- [🛠 Vuex -> Apollo Migration: a proof-of-concept project](https://gitlab.com/ntepluhina/vuex-to-apollo/blob/master/README.md)
   - A collection of examples that show the possible approaches for state management with Vue+GraphQL+(Vuex or Apollo) apps
 
 ### Libraries
@@ -30,7 +30,7 @@ when using GraphQL for frontend development.
 If you are using GraphQL within a Vue application, the [Usage in Vue](#usage-in-vue) section
 can help you learn how to integrate Vue Apollo.
 
-For other usecases, check out the [Usage outside of Vue](#usage-outside-of-vue) section.
+For other use cases, check out the [Usage outside of Vue](#usage-outside-of-vue) section.
 
 ### Tooling
 
@@ -650,7 +650,7 @@ When [using Vuex](#Using-with-Vuex), disable the cache when:
 
 - The data is being cached elsewhere
 - The use case does not need caching
-if the data is being cached elsewhere, or if there is simply no need for it for the given usecase.
+if the data is being cached elsewhere, or if there is simply no need for it for the given use case.
 
 ```javascript
 import createDefaultClient from '~/lib/graphql';