I have already done a preliminary review for you, and I hope to help you do a better job.

Based on the pull request, the key changes are updating the image for tiflash in the pipeline files and fixing the path for the pod yaml files in the release-6.1 and release-7.5 branches.

There are no potential problems identified in the pull request. However, here are some suggestions to improve the pull request:

1. It's good to have a more detailed description of the changes made in the pull request, such as the reason for updating the image and the impact of the changes on the pipeline.
2. It's also recommended to have a testing plan to ensure the changes made in the pipeline are working as expected.

As for fixing suggestions, the pull request seems to be well-written and comprehensive. No further fixes are needed.

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