doc: fix godoc for WithEndpointURL and WithEndpoint #10666

Job	Run time
lint	1m 53s
compatibility-test (~1.22.0, ubuntu-latest, 386)	58s
compatibility-test (~1.22.0, ubuntu-latest, amd64)	24s
test-coverage	44s
compatibility-test (~1.22.0, macos-latest, amd64)	1m 8s
test-bench	27s
compatibility-test (~1.22.0, windows-latest, 386)	2m 9s
compatibility-test (~1.22.0, windows-latest, amd64)	3m 47s
test-race	1m 53s
compatibility-test (~1.21.3, ubuntu-latest, 386)	11s
compatibility-test (~1.21.3, ubuntu-latest, amd64)	1m 9s
compatibility-test (~1.21.3, macos-latest, amd64)	55s
compatibility-test (~1.21.3, windows-latest, 386)	2m 32s
compatibility-test (~1.21.3, windows-latest, amd64)	3m 34s
compatibility-test (~1.20.10, ubuntu-latest, 386)	17s
compatibility-test (~1.20.10, ubuntu-latest, amd64)	1m 7s
compatibility-test (~1.20.10, macos-latest, amd64)	1m 15s
compatibility-test (~1.20.10, windows-latest, 386)	2m 45s
compatibility-test (~1.20.10, windows-latest, amd64)	4m 15s
test-compatibility	1s
	31m 24s

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