Update RELEASING.md (#1253)

RELEASING.md

@@ -11,16 +11,15 @@
     ```bash 
     github_changelog_generator -u mongodb -p terraform-provider-mongodbatlas --enhancement-label "**Enhancements**" --bugs-label "**Bug Fixes**"
     ```
--  Open a PR against the release branch
+-  Open a PR against the **master** branch
 
 ### Pre-release the provider 
 We pre-release the provider to make for testing purpose. **A Pre-release is not published to the Hashicorp Terraform Registry**.
 
 - Open the GitHub repository release page and click draft a new release
-- Fill the pre-release tag and select the correct target branch
+- Fill the pre-release tag and select `master` as the target branch
 
     <img width="370" alt="image2" src="https://github.com/mongodb/terraform-provider-mongodbatlas/assets/5663078/e710c0ff-dc00-44c2-9eb6-146cd791d47e">
-
 - Generate Release Notes: Click Generate release notes button to populate release notes
 - Set publishing to Pre-release
 
@@ -30,7 +29,6 @@ We pre-release the provider to make for testing purpose. **A Pre-release is not
 
 ### Release the provider
 - Follow the same steps in the pre-release but provide the final release tag (example `v1.9.0`). This will trigger the release action that will release the provider to the GitHub Release page. Harshicorp has a process in place that will retrieve the latest release from the GitHub repository and add the binaries to the Hashicorp Terraform Registry.
-- Merge the release branch into master
 - **CDKTF Update**: Once the provider has been released, we need to update the provider version in our CDKTF. Raise a PR against [cdktf/cdktf-repository-manager](https://github.com/cdktf/cdktf-repository-manager).
   - Example PR: [#183](https://github.com/cdktf/cdktf-repository-manager/pull/183)