Bump golang in /examples/splunk-hec/logging (#6299) #13772

Job	Run time
lint	17m 16s
generate-metrics	5m 49s
coverage	12m 5s
tidy	2m 7s
gofmt	7m 38s
unit-test (macos-13-xlarge) / unit-test	8m 0s
unit-test (ubuntu-24.04) / unit-test	8m 15s
unit-test (macos-13) / unit-test	8m 17s
unit-test (macos-14) / unit-test	8m 15s
unit-test (macos-15) / unit-test	8m 15s
cross-compile (binaries-linux_amd64) / compile	6m 43s
cross-compile (binaries-linux_ppc64le) / compile	6m 18s
cross-compile (binaries-windows_amd64) / compile	6m 30s
cross-compile (binaries-linux_arm64) / compile	6m 39s
cross-compile (binaries-darwin_arm64) / compile	6m 18s
cross-compile (binaries-darwin_amd64) / compile	6m 24s
	2h 4m 49s

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