docs: release notes for the v20.3.23 release

[dgp1130]

Cherry-picks the changelog from the "20.3.x" branch to the next branch (main).

[gemini-code-assist]

Code Review

This pull request updates the CHANGELOG.md to include version 20.3.23, which documents a Vite update to 7.3.2. It also includes minor whitespace cleanup in several older changelog entries. A suggestion was made to use a more compact markdown table format for the new entry to improve the readability and maintainability of the raw markdown file.

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CHANGELOG.md (7-9)

The current markdown table formatting makes the source file difficult to read due to wide, uneven columns. For better readability and maintainability of the raw markdown, I suggest a more compact format. This change will not affect the rendered HTML.

| Commit | Type | Description |
| --- | --- | --- |
| [ccab02ba0](https://github.com/angular/angular-cli/commit/ccab02ba0413f25464a6e4cb5871716b221013b7) | fix | update vite to `7.3.2` |

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