intersphinx: Fix double forward slashes in inventory urls (#12807) #569

Job	Run time
Python 3.10 (Docutils 0.20)	2m 46s
Python 3.10 (Docutils 0.21)	2m 46s
Python 3.11 (Docutils 0.20)	2m 23s
Python 3.11 (Docutils 0.21)	2m 48s
Python 3.12 (Docutils 0.20)	2m 52s
Python 3.12 (Docutils 0.21)	3m 1s
Python 3.13-dev (Docutils 0.20)	3m 20s
Python 3.13-dev (Docutils 0.21)	3m 12s
Python 3.13-dev (Docutils 0.20; free-threaded)	3m 45s
Windows	5m 33s
Python 3.13-dev (Docutils 0.21; free-threaded)	3m 41s
Docutils HEAD	3m 25s
Coverage	0s
LaTeX	4m 49s
Oldest supported	3m 0s
	47m 21s

Provide feedback