Fix demo links #15663

Job	Run time
lint	1m 59s
test-bench	28s
test-concurrent-safe	3m 58s
test-race	2m 0s
test-coverage	48s
compatibility-test (1.23.0, ubuntu-latest, 386)	27s
compatibility-test (1.23.0, ubuntu-latest, amd64)	1m 12s
compatibility-test (1.23.0, otel-linux-arm64, arm64)	24s
compatibility-test (1.23.0, macos-13, amd64)	55s
compatibility-test (1.23.0, macos-latest, arm64)	54s
compatibility-test (1.23.0, windows-latest, 386)	4m 5s
compatibility-test (1.23.0, windows-latest, amd64)	2m 56s
compatibility-test (~1.22.5, ubuntu-latest, 386)	16s
compatibility-test (~1.22.5, ubuntu-latest, amd64)	1m 0s
compatibility-test (~1.22.5, otel-linux-arm64, arm64)	25s
compatibility-test (~1.22.5, macos-13, amd64)	33s
compatibility-test (~1.22.5, macos-latest, arm64)	26s
compatibility-test (~1.22.5, windows-latest, 386)	2m 52s
compatibility-test (~1.22.5, windows-latest, amd64)	4m 25s
codecov	4s
test-compatibility	1s
	30m 8s

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