[Doc] Update doc to work with release (#85)

1. Update CANN image name
2. Add pta install step
3. update vllm-ascend docker image name to ghcr
4. update quick_start to use vllm-ascend image directly.
5. fix `note` style

Signed-off-by: wangxiyuan <wangxiyuan1007@gmail.com>

docs/source/developer_guide/contributing.md

@@ -98,8 +98,9 @@ Only specific types of PRs will be reviewed. The PR title is prefixed appropriat
 - `[CI]` for build or continuous integration improvements.
 - `[Misc]` for PRs that do not fit the above categories. Please use this sparingly.
 
-> [!NOTE]
-> If the PR spans more than one category, please include all relevant prefixes.
+:::{note}
+If the PR spans more than one category, please include all relevant prefixes.
+:::
 
 ## Others