chore: bump golang from `d996c64` to `48b942a` in /build/tooling #8104

Job	Run time
Build and Test (1.26.3)	6m 28s
Build and Test (1.27.1)	6m 33s
[Generator Resource Expansion] Build and Test	6m 47s
Build and Test (1.28.0)	6m 27s
[Helm] Build and Test (3.14.1, gatekeeper-system)	5m 51s
Build and Test (1.29.0)	6m 29s
[Helm] Build and Test (3.14.1, custom-namespace)	5m 40s
	44m 15s

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