feat: update NGINX version to 1.26.3 #3508

Job	Run time
codeql / code-security (python)	2m 9s
codeql / code-security (javascript)	2m 58s
build-containers (scheduler) / build	52s
build-containers (bunkerweb) / build	4m 12s
build-containers (autoconf) / build	42s
build-containers (ui) / build	1m 14s
build-packages (debian) / build	6m 42s
build-packages (fedora) / build	6m 42s
build-packages (fedora-41) / build	6m 26s
build-packages (rhel) / build	6m 40s
build-packages (rhel9) / build	6m 53s
build-packages (ubuntu) / build	6m 40s
build-packages (ubuntu-jammy) / build	6m 42s
push-dev	57s
push-packages	0s
	59m 49s

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