Correct reversed interdiff argument order
### Problem/Motivation
Fix a logic error where interdiff arguments were swapped (new patch then old patch instead of old then new), producing reversed patches in drupal.org issue comments.
### References
- Related issue(s): [#3577030](https://www.drupal.org/i/3577030)
### Work items
- Commit(s): [c0b3c22ff3](https://git.drupalcode.org/project/project_analysis/-/commit/c0b3c22ff32e)
### Credit
- Implemented by: @bbrala
- Reported by: @darthsteven
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*Filed retroactively as part of the Drupal 12 rector coverage effort. Closed as fixed; credit to be applied to the contributors listed above.*
*AI was used extensively to build this work and to file this issue. See [Dries Buytaert: AI-generated Rector rules for Drupal](https://dri.es/ai-generated-rector-rules-for-drupal) and [Björn Brala: Drupal Rector rules are config, not code. Mostly.](https://www.linkedin.com/pulse/drupal-rector-rules-config-code-mostly-bj%C3%B6rn-brala-vfpwe/).*
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