DOC: Add missing roles to release notes
Checklist
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I have read the contribution guidelines. -
Unit tests have been added for any new or changed code, and the test suite passes. Note: Your request will likely not be merged without the appropriate tests. -
"closes #XXXX" is in the body of the MR description to link the related issue, if applicable.
This MR adds missing roles for a couple of entries in "Algorithms" and "Optimizers" sections of the release notes.