Update Roadmap Milestones doc (#5824)

Conclude finished v1.11, add missing v1.12, update vNext reference to
current v2.0 name.

<!-- To check a checkbox place an "x" between the brackets. e.g: [x] -->

- [x] I have signed the [Contributor License
Agreement](https://cla.opensource.microsoft.com/microsoft/winget-pkgs).
- [ ] I have updated the [Release Notes](../doc/ReleaseNotes.md).
- [ ] This pull request is related to an issue.

-----

###### Microsoft Reviewers: [Open in
CodeFlow](https://microsoft.github.io/open-pr/?codeflow=https://github.com/microsoft/winget-cli/pull/5824)

Author: Kissaki

doc/windows-package-manager-release-roadmap.md

@@ -41,14 +41,14 @@ We use [GitHub Projects](https://github.com/orgs/microsoft/projects/137) to broa
 
 | Milestone                                                                                                     | Description                                     | Status             |
 | ------------------------------------------------------------------------------------------------------------- | ----------------------------------------------- | ------------------ |
-| [v1.7-Client](https://github.com/microsoft/winget-cli/milestone/42)                                           | Work Targeted for v1.7                          | :white_check_mark: |
-| [v1.8-Client](https://github.com/microsoft/winget-cli/milestone/43)                                           | Work Targeted for v1.8                          | :white_check_mark: |
-| [v1.9-Client](https://github.com/microsoft/winget-cli/milestone/44)                                           | Work Targeted for v1.9                          | :white_check_mark: |
-| [v1.10-Client](https://github.com/microsoft/winget-cli/milestone/45)                                          | Work Targeted for v1.10                         | :white_check_mark: |
-| [v1.11-Client](https://github.com/microsoft/winget-cli/milestone/46)                                          | Work Targeted for v1.11                         | :construction:     |
-| [v.Next-Client](https://github.com/microsoft/winget-cli/milestone/41)                                         | Triage for the next Milestone                   | :rocket:           |
+| [v1.12-Client](https://github.com/microsoft/winget-cli/milestone/47)                                          | Work Targeted for v1.12                         | :white_check_mark: |
+| [v1.28-Client](https://github.com/microsoft/winget-cli/milestone/48)                                          | Work Targeted for v1.28                         | :construction:     |
+| [v1.29-Client](https://github.com/microsoft/winget-cli/milestone/49)                                          | Work Targeted for v1.29                         | :construction:     |
+| [v2.0-Client](https://github.com/microsoft/winget-cli/milestone/41)                                           | Work Targeted for breaking-change Release       | :rocket:           |
 | [Backlog-Client](https://github.com/microsoft/winget-cli/issues?q=is%3Aissue%20state%3Aopen%20no%3Amilestone) | Work not yet assigned to a milestone or release | N/A                |
 
+Older milestones can be found in the [list of closed milestones](https://github.com/microsoft/winget-cli/milestones?state=closed).
+
 ## Issue Triage & Prioritization
 
 Incoming issues/asks/etc. are triaged several times a week, labelled appropriately, and assigned to a milestone in priority order: