Update stefanzweifel/git-auto-commit-action action to v6 #13473

Job	Run time
Checks and variables	1m 42s
Unit Tests	1m 22s
NJS Unit Tests	22s
Build Binary	29s
Build Plus images / build	1m 19s
Build OSS images (ngf, linux/arm64, linux/amd64) / build	1m 6s
Build OSS images (nginx, linux/arm64, linux/amd64) / build	1m 11s
Helm Tests	-1s
Conformance tests (plus, v1.33.1, false) / Run Tests	8m 6s
Conformance tests (nginx, v1.33.1, true) / Run Tests	10m 35s
Conformance tests (nginx, v1.25.16, false) / Run Tests	8m 7s
Conformance tests (plus, v1.25.16, false) / Run Tests	8m 36s
Conformance tests (nginx, v1.33.1, false) / Run Tests	6m 43s
Conformance tests (plus, v1.25.16, true) / Run Tests	8m 41s
Conformance tests (nginx, v1.25.16, true) / Run Tests	8m 34s
Conformance tests (plus, v1.33.1, true) / Run Tests	8m 38s
Functional tests (nginx, v1.33.1) / Run Tests	14m 19s
Functional tests (plus, v1.33.1) / Run Tests	13m 22s
Functional tests (plus, v1.25.16) / Run Tests	9m 10s
Functional tests (nginx, v1.25.16) / Run Tests	15m 16s
Package and Publish Helm Chart	0s
	2h 7m 37s

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