docs(karpor): add DeepSeek AI backend option to installation guide

[Cookiery]

1. Does this PR affect any open issues?(Y/N) and add issue references (e.g. "fix #123", "re #123".):

• N
• Y

2. What is the scope of this PR (e.g. component or file name):

3. Provide a description of the PR(e.g. more details, effects, motivations or doc link):

• Affects user behaviors
• Contains syntax changes
• Contains variable changes
• Contains experimental features
• Performance regression: Consumes more CPU
• Performance regression: Consumes more Memory
• Other

4. Are there any breaking changes?(Y/N) and describe the breaking changes(e.g. more details, motivations or doc link):

• N
• Y

5. Are there test cases for these changes?(Y/N) select and add more details, references or doc links:

• Unit test
• Integration test
• Benchmark (add benchmark stats below)
• Manual test (add detailed scripts or steps below)
• Other

6. Release note

Please refer to Release Notes Language Style Guide to write a quality release note.

None

[elliotxx]

@Cookiery Hey, I have verified this feature and released the official version v0.6.3. Can you please change the appVersion in Chart.yaml to v0.6.3? The modifications in chart must be used with the official version.

[Cookiery]

@Cookiery Hey, I have verified this feature and released the official version v0.6.3. Can you please change the appVersion in Chart.yaml to v0.6.3? The modifications in chart must be used with the official version.

Changed it

[elliotxx]

lgtm