Bump golang in /examples/splunk-hec-traces/tracing (#6295) #13777

Job	Run time
gofmt	7m 29s
generate-metrics	5m 50s
lint	11m 54s
coverage	11m 57s
tidy	2m 0s
unit-test (macos-13) / unit-test	14m 44s
unit-test (macos-14) / unit-test	12m 16s
unit-test (macos-15) / unit-test	13m 58s
unit-test (macos-13-xlarge) / unit-test	9m 23s
unit-test (ubuntu-24.04) / unit-test	11m 18s
cross-compile (binaries-linux_arm64) / compile	6m 25s
cross-compile (binaries-windows_amd64) / compile	6m 27s
cross-compile (binaries-linux_ppc64le) / compile	6m 21s
cross-compile (binaries-darwin_amd64) / compile	6m 29s
cross-compile (binaries-darwin_arm64) / compile	6m 14s
cross-compile (binaries-linux_amd64) / compile	6m 29s
	2h 19m 14s

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