[CODEOWNERS] Update .github owners
Added myself to the CodeOwners for .github dir as I will be helping with GitHub CXP on this repo.
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# Git Hub integration and bot rules
-/.github/ @jsquire @jhendrixMSFT @rickwinter
+/.github/ @jsquire @jhendrixMSFT @rickwinter @ronniegeraghty
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# SDK (track2)
