Update NuGet.org package owner to ModelContextProtocol #1414

Job	Run time
build (ubuntu-latest, Release)	5m 40s
build (ubuntu-latest, Debug)	5m 56s
build (windows-latest, Debug)	10m 31s
build (macos-latest, Release)	4m 43s
build (macos-latest, Debug)	8m 1s
build (windows-latest, Release)	9m 52s
publish-coverage / publish-coverage	33s
	45m 16s

Provide feedback