doc: Adapt GLib documentation path to GLib 2.80.1 #293

Job	Run time
Arch Linux	1m 59s
Get Fedora Releases	3s
OpenMandriva Cooker	4m 33s
Mageia 8	1m 59s
openSUSE Tumbleweed	2m 35s
Installed RPM Tests (Stable Fedora) (x86_64, 38)	3m 34s
Installed RPM Tests (Stable Fedora) (x86_64, 39)	4m 35s
Unit Tests (Stable Fedora) (38)	3m 37s
Installed RPM Tests (Devel Fedora) (x86_64, 41)	41s
Installed RPM Tests (Stable Fedora) (x86_64, 40)	2m 37s
Unit Tests (Devel Fedora) (41)	11s
Unit Tests (Stable Fedora) (39)	3m 33s
Unit Tests (Stable Fedora) (40)	3m 9s
	33m 6s

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