Add Academia.edu webpack-to-rspack testimonial to README

**Metr Tracking Issue**

**Category**: docs
**Commits**: 1
**Lines changed**: 14 (+14/-0)
**Time span**: 0 hours

**PRs**:
- #1022 - Add Academia.edu webpack-to-rspack testimonial to README

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<summary>Commit details</summary>

- `5d558b9` Add Academia.edu webpack-to-rspack testimonial to README (#1022) (+14/-0)

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