Bump @grpc/grpc-js from 1.12.0 to 1.12.2 #9739

Job	Run time
build (ubuntu-latest)	1m 33s
testing (windows-latest, 3.10, 18.x, 1)	4m 31s
build (windows-latest)	3m 24s
testing (windows-latest, 3.12, 20.x, 2)	4m 31s
testing (ubuntu-latest, 3.10, 22.x, 3)	2m 58s
testing (ubuntu-latest, 3.11, 20.x, 4)	3m 0s
testing (windows-latest, 3.9, 20.x, 1)	5m 48s
testing (ubuntu-latest, 3.10, 18.x, 2)	2m 23s
testing (ubuntu-latest, 3.9, 18.x, 3)	2m 57s
testing (ubuntu-latest, 3.10, 20.x, 4)	2m 51s
testing (ubuntu-latest, 3.11, 20.x, 1)	3m 13s
testing (macos-latest, 3.11, 20.x, 1)	2m 56s
testing (macos-latest, 3.12, 20.x, 2)	2m 46s
testing (macos-latest, 3.10, 20.x, 3)	3m 4s
test-install (windows-latest, 3.11, 18.x)	7m 19s
test-install (ubuntu-latest, 3.9, 18.x)	4m 38s
test-install (ubuntu-latest, 3.11, 18.x)	4m 19s
test-install (ubuntu-latest, 3.11, 20.x)	4m 28s
	1h 6m 39s

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