The contribution guidelines for documentation are outdated due to the recent migration. Here are the fixes/updates -
- Removed the following files from `contribution/docs/` -
  - [CONTRIBUTING.md](https://github.com/appsmithorg/appsmith/blob/release/contributions/docs/CONTRIBUTING.md)
  - [DB Integrations.md](https://github.com/appsmithorg/appsmith/blob/release/contributions/docs/DB%20Integrations.md)
  - [UploadingAssets.md](https://github.com/appsmithorg/appsmith/blob/release/contributions/docs/UploadingAssets.md)
  - [Widgets.md](https://github.com/appsmithorg/appsmith/blob/release/contributions/docs/Widgets.md)
  - [adding_guides.md](https://github.com/appsmithorg/appsmith/blob/release/contributions/docs/adding_guides.md)
- Removed [Documentation Improvement](https://github.com/appsmithorg/appsmith/blob/release/.github/ISSUE_TEMPLATE/--documentation-improvement.yaml) template as we have created [new templates](https://github.com/appsmithorg/appsmith-docs/issues/new/choose) in the [appsmith-docs](https://github.com/appsmithorg/appsmith-docs) repository.
- Updated the relevant links in the [Documentation Improvement](https://github.com/appsmithorg/appsmith/blob/release/CONTRIBUTING.md#-improve-the-documentation) section ( template links and contribution guidelines for docs) of [CONTRIBUTING.md](https://github.com/appsmithorg/appsmith/blob/release/CONTRIBUTING.md

) file.

Co-authored-by: Pranay105 <pranaybhardwaj@Pranays-MacBook-Pro.local>