docs: fix typos in README (#465)

Author: lukaszsamson

README.md

@@ -10,7 +10,7 @@ Features include:
 
 - Code completion
 - Debugger support [VSCode debugging docs](https://code.visualstudio.com/docs/editor/debugging)
-- Test discovery, running and debugging via Test Explorer [VSCode test API announcment](https://code.visualstudio.com/updates/v1_59#_testing-apis)
+- Test discovery, running and debugging via Test Explorer [VSCode test API announcement](https://code.visualstudio.com/updates/v1_59#_testing-apis)
 - Automatic, incremental Dialyzer analysis
 - Automatic suggestion for @spec annotations based on Dialyzer's inferred success typings
 - Diagnostic reporting of build warnings and errors
@@ -28,7 +28,7 @@ Features include:
 
 ## This is the main vscode-elixir-ls repo
 
-The [elixir-lsp](https://github.com/elixir-lsp)/[vscode-elixir-ls](https://github.com/elixir-lsp/vscode-elixir-ls) repo began as a fork when the original repo at [JakeBecker](https://github.com/JakeBecker)/[vscode-elixir-ls](https://github.com/JakeBecker/vscode-elixir-ls) became inactive for an extended period of time. So we decided to start an active fork to merge dormant PR's and fix issues where possible. We also believe in an open and shared governance model to share the work instead of relying on one person to shoulder the whole burden.
+The [elixir-lsp](https://github.com/elixir-lsp)/[vscode-elixir-ls](https://github.com/elixir-lsp/vscode-elixir-ls) repo began as a fork when the original repo at [JakeBecker](https://github.com/JakeBecker)/[vscode-elixir-ls](https://github.com/JakeBecker/vscode-elixir-ls) became inactive for an extended period of time. So we decided to start an active fork to merge dormant PRs and fix issues where possible. We also believe in an open and shared governance model to share the work instead of relying on one person to shoulder the whole burden.
 
 The original repository has now been deprecated in favor of this one. Future updates to the original [VS Code ElixirLS extension](https://marketplace.visualstudio.com/items?itemName=JakeBecker.elixir-ls) will come from this repo.
 
@@ -89,7 +89,7 @@ The test runner builds a launch configuration dynamically basing on hardcoded de
 }
 ```
 
-The default launch config can be customized by providing a project launch configuration named `mix test`. If found, this launch config is used as default for running and debugging tests.
+The default launch config can be customized by providing a project launch configuration named `mix test`. If found, this launch config is used as the default for running and debugging tests.
 
 Example: