docs(MAINTAINERS): add katelyn martin as collaborator #2998

Job	Run time
semver	18s
Verify hyper.h is up to date	17s
Check Style	6s
Check MSRV	22s
minimal-versions	29s
Test cargo-c support (FFI)	15s
Test beta on windows-latest	1m 51s
Test stable on ubuntu-latest	53s
Test stable on macOS-latest	53s
features	27s
Test stable on windows-latest	4m 16s
Test beta on macOS-latest	55s
Test nightly on ubuntu-latest	54s
Test nightly on windows-latest	2m 21s
Test C API (FFI)	13s
Test beta on ubuntu-latest	55s
udeps	25s
Test with Miri	2m 30s
Test nightly on macOS-latest	56s
Build docs	15s
Check exposed types	21s
CI is green	2s
	19m 54s

Provide feedback