Add @ycombinator as codeowner for elasticsearchexporter (#32171) #8

Job	Run time
windows-unittest-matrix (receiver-0)	20m 53s
windows-unittest-matrix (receiver-1)	22m 25s
windows-unittest-matrix (processor)	19m 2s
windows-unittest-matrix (exporter)	34m 40s
windows-unittest-matrix (extension)	17m 24s
windows-unittest-matrix (internal)	16m 35s
windows-unittest-matrix (pkg)	16m 4s
windows-unittest-matrix (cmd)	32m 20s
windows-unittest-matrix (other)	27m 9s
windows-unittest	5s
	3h 26m 37s

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