Fix typos

Author: ntrogh

release-notes/v1_98.md

@@ -191,7 +191,7 @@ Alternatively, you can change the model that is used for code completions via **
 
 This release, we added more models to choose from when using Copilot. The following models are now available in the model picker in Visual Studio Code and github.com chat:
 
-* **OpenAI GPT 4.5 (Preview)**: OpenAI’s latest model, GPT-4.5, is now available in GitHub Copilot Chat to Copilot Enterprise users. GPT-4.5 is a large language model designed with advanced capabilities in intuition, writing style, and broad knowledge. Learn more about the GPT-4.5 model availability in the [GitHub blog post](https://github.blog/changelog/2025-02-27-openai-gpt-4-5-in-github-copilot-now-available-in-public-preview).
+* **GPT 4.5 (Preview)**: OpenAI’s latest model, GPT-4.5, is now available in GitHub Copilot Chat to Copilot Enterprise users. GPT-4.5 is a large language model designed with advanced capabilities in intuition, writing style, and broad knowledge. Learn more about the GPT-4.5 model availability in the [GitHub blog post](https://github.blog/changelog/2025-02-27-openai-gpt-4-5-in-github-copilot-now-available-in-public-preview).
 
 * **Claude 3.7 Sonnet (Preview)**: Claude 3.7 Sonnet is now available to all customers on paid Copilot plans. This new Sonnet model supports both thinking and non-thinking modes in Copilot. In initial testing, we’ve seen particularly strong improvements in agentic scenarios. Learn more about the Claude 3.7 Sonnet model availability in the [GitHub blog post](https://github.blog/changelog/2025-02-24-claude-3-7-sonnet-is-now-available-in-github-copilot-in-public-preview/).
 
@@ -556,7 +556,7 @@ The GitHub Authentication extension now leverages Electron's version of `fetch`
 
 ## Extension authoring
 
-### Autentication
+### Authentication
 
 > **Important**:
 > We are renaming `AuthenticationForceNewSessionOptions` to `AuthenticationGetSessionPresentationOptions` and leaving a deprecated `AuthenticationForceNewSessionOptions` for now. There is no functional difference, so this is not a breaking change in the runtime, but you should update your code to use `AuthenticationGetSessionPresentationOptions` instead of `AuthenticationForceNewSessionOptions` since it will be removed in the future.