Fix outdated information about larger runners billing (#437)

Remove incorrect claim that larger runners are free for public repos.
Current GitHub documentation states they are not free.

Fixes #435

Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
Co-authored-by: Yang <[email protected]>

Author: devin-ai-integration[bot]

README.md

@@ -12,7 +12,7 @@ This presents a challenge when running emulators on CI especially when running e
 
 ## Running hardware accelerated emulators on Linux runners
 
-GitHub's [larger Linux runners support running hardware accelerated emulators](https://github.blog/changelog/2023-02-23-hardware-accelerated-android-virtualization-on-actions-windows-and-linux-larger-hosted-runners/) which is [free for public GitHub repos](https://github.blog/2024-01-17-github-hosted-runners-double-the-power-for-open-source/). It is now recommended to use the **Ubuntu** (`ubuntu-latest`) runners which are 2-3 times faster than the **macOS** ones which are also a lot more expensive. Remember to enable KVM in your workflow before running this action:
+GitHub's [larger Linux runners support running hardware accelerated emulators](https://github.blog/changelog/2023-02-23-hardware-accelerated-android-virtualization-on-actions-windows-and-linux-larger-hosted-runners/). It is now recommended to use the **Ubuntu** (`ubuntu-latest`) runners which are 2-3 times faster than the **macOS** ones which are also a lot more expensive. Remember to enable KVM in your workflow before running this action:
 
 ```
 - name: Enable KVM group perms