[Doc] Fix link error and DynamoDB parameter error

[ShuiMu-peng]

Purpose of this pull request

Doc: 1. Link error. 2.DynamoDB connection parameter error

Does this PR introduce any user-facing change?

1. It turned out that some links to the Chinese documents pointed to the English document addresses
2. The parameters of the Dynamodb connector are incorrect

How was this patch tested?

No test is needed.

Check list

• If any new Jar binary package adding in your PR, please add License Notice according
  New License Guide
• If necessary, please update the documentation to describe the new feature. https://github.com/apache/seatunnel/tree/dev/docs
• If you are contributing the connector code, please check that the following files are updated:
  1. Update plugin-mapping.properties and add new connector information in it
  2. Update the pom file of seatunnel-dist
  3. Add ci label in label-scope-conf
  4. Add e2e testcase in seatunnel-e2e
  5. Update connector plugin_config

[Copilot]

Pull Request Overview

This PR updates several documentation pages to correct broken links and fixes DynamoDB connection parameter names. The changes ensure that the Chinese docs reference the proper relative file paths and that the DynamoDB parameters use snake_case for consistency.

• Updated relative links in various docs to point to the correct local resources.
• Corrected DynamoDB parameter names from accessKeyId/secretAccessKey to access_key_id/secret_access_key.

Reviewed Changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
docs/zh/start-v2/locally/quick-start-spark.md	Updated link for Spark documentation
docs/zh/connector-v2/sink/HdfsFile.md	Updated link for connector feature reference
docs/zh/connector-v2/sink/Assert.md	Revised link for FakeSource usage example
docs/zh/connector-v2/sink/AmazonDynamoDB.md	Changed parameter names for DynamoDB connection
docs/zh/concept/config.md	Updated relative links for source, transform, and sink
docs/zh/concept/JobEnvConfig.md	Updated relative link for config encryption documentation

[Hisoka-X]

Thanks @ShuiMu-peng . Could you follow the guide to open ci on your fork repository? https://github.com/apache/seatunnel/pull/9447/checks?check_run_id=44221269862

[ShuiMu-peng]

Ok. ci has been enabled @Hisoka-X

[Hisoka-X]

Could you update https://github.com/apache/seatunnel/blob/dev/docs/zh/connector-v2/source/AmazonDynamoDB.md#accesskeyid-string and english doc of AmazonDynamoDB.md?

[ShuiMu-peng]

Ok. It has been updated

[Hisoka-X]

LGTM if ci passes. Thanks @ShuiMu-peng