Update actions/upload-artifact action to v4.6.2 #12038

Job	Run time
Checks and variables	1m 23s
NJS Unit Tests	14s
Unit Tests	47s
Build Binary	36s
Build Plus images / build	1m 2s
Build OSS images (ngf, linux/arm64, linux/amd64) / build	1m 13s
Build OSS images (nginx, linux/arm64, linux/amd64) / build	1m 26s
Helm Tests	0s
Conformance tests (nginx, v1.25.16, true) / Run Tests	6m 38s
Conformance tests (nginx, v1.25.16, false) / Run Tests	6m 33s
Conformance tests (nginx, v1.32.3, true) / Run Tests	6m 44s
Conformance tests (nginx, v1.32.3, false) / Run Tests	5m 54s
Conformance tests (plus, v1.25.16, false) / Run Tests	6m 25s
Conformance tests (plus, v1.25.16, true) / Run Tests	7m 8s
Conformance tests (plus, v1.32.3, false) / Run Tests	6m 46s
Conformance tests (plus, v1.32.3, true) / Run Tests	6m 15s
Functional tests (nginx, v1.32.3) / Run Tests	12m 54s
Functional tests (nginx, v1.25.16) / Run Tests	13m 12s
Functional tests (plus, v1.25.16) / Run Tests	14m 6s
Functional tests (plus, v1.32.3) / Run Tests	12m 44s
Package and Publish Helm Chart	0s
	1h 52m 0s

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