Update stefanzweifel/git-auto-commit-action action to v6 #13478

Job	Run time
Checks and variables	1m 38s
Unit Tests	1m 21s
NJS Unit Tests	13s
Build Binary	31s
Build Plus images / build	1m 30s
Build OSS images (ngf, linux/arm64, linux/amd64) / build	1m 8s
Build OSS images (nginx, linux/arm64, linux/amd64) / build	1m 35s
Functional tests (plus, v1.33.1) / Run Tests	13m 34s
Functional tests (nginx, v1.25.16) / Run Tests	16m 7s
Functional tests (plus, v1.25.16) / Run Tests	14m 44s
Conformance tests (nginx, v1.33.1, true) / Run Tests	7m 32s
Functional tests (nginx, v1.33.1) / Run Tests	15m 20s
Conformance tests (plus, v1.33.1, false) / Run Tests	8m 4s
Conformance tests (plus, v1.25.16, true) / Run Tests	8m 38s
Conformance tests (nginx, v1.33.1, false) / Run Tests	6m 57s
Conformance tests (nginx, v1.25.16, true) / Run Tests	8m 12s
Conformance tests (plus, v1.25.16, false) / Run Tests	8m 48s
Conformance tests (nginx, v1.25.16, false) / Run Tests	8m 16s
Helm Tests	0s
Conformance tests (plus, v1.33.1, true) / Run Tests	7m 59s
Package and Publish Helm Chart	0s
	2h 12m 7s

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