chore: add new testimonial (#11)

### Explanation

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### Issue

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### Attestations

- [ ] I have read and agree to the [Code of Conduct](https://docs.nhcarrigan.com/community/coc/)
- [ ] I have read and agree to the [Community Guidelines](https://docs.nhcarrigan.com/community/guide/).
- [ ] My contribution complies with the [Contributor Covenant](https://docs.nhcarrigan.com/dev/covenant/).

### Dependencies

- [ ] I have pinned the dependencies to a specific patch version.

### Style

- [ ] I have run the linter and resolved any errors.
- [ ] My pull request uses an appropriate title, matching the conventional commit standards.
- [ ] My scope of feat/fix/chore/etc. correctly matches the nature of changes in my pull request.

### Tests

- [ ] My contribution adds new code, and I have added tests to cover it.
- [ ] My contribution modifies existing code, and I have updated the tests to reflect these changes.
- [ ] All new and existing tests pass locally with my changes.
- [ ] Code coverage remains at or above the configured threshold.

### Documentation

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### Versioning

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Reviewed-on: #11

data/testimonials.yml

@@ -217,3 +217,6 @@
 - name: GDG Memphis
   content: "[Naomi Carrigan] is a developer at freeCodeCamp. Primarily working in TypeScript, she has built CLI tools, curriculum content, APIs, and Discord bots. She is very passionate about open source and community building, and has helped shape and guide multiple OSS communities and developers."
   date: 21 September 2021
+- name: Frances (paraphrased from dm)
+  content: "I have seen how much constant work you've done; all the kindness, inspiration, and positive energy you've poured into each of us through the years. The online world can be so cold, fake, and uncaring, but I feel your graciousness, warmth, and tenderness through your constancy, words, and patience. Thank you, basically, for being you. You've been a constant example of doing good work."
+  date: 18 April 2026