fix: image tag error in Helm

[z1cheng]

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

• N
• Y

fix KusionStack/karpor#561

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

Tested it locally:

6. Release note

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

None

[elliotxx]

@z1cheng I tested two case and they both worked fine. Good job!

[elliotxx]

@z1cheng Hi you still need to do a little work. 🤏 The Ci Lint is not passed because the template is modified. You need the bump chart version to 0.5.6 👇, and then execute the make doc to update readme in ./charts/karpor

[z1cheng]

@elliotxx Updated, please trigger the workflow again.

[elliotxx]

lgtm