debian: align postgres repo url with docs #641

Job	Run time
Generate Jobs	41s
18beta3-bookworm	1m 14s
18beta3	1m 24s
18beta3-alpine3.22	6m 3s
17.6	1m 15s
18beta3-alpine3.21	6m 7s
17.6-bookworm	1m 15s
16.10-bookworm	1m 14s
15.14-bookworm	1m 13s
15.14	1m 11s
16.10	1m 12s
16.10-alpine3.22	5m 37s
17.6-alpine3.21	6m 15s
14.19	1m 16s
16.10-alpine3.21	5m 41s
13.22	1m 15s
18beta3 (force deb build)	13m 21s
15.14-alpine3.21	5m 29s
15.14-alpine3.22	5m 38s
14.19-alpine3.22	5m 30s
18beta3-bookworm (force deb build)	13m 20s
15.14-bookworm (force deb build)	12m 28s
13.22-bookworm	1m 9s
16.10 (force deb build)	12m 24s
17.6-alpine3.22	6m 6s
17.6-bookworm (force deb build)	13m 11s
14.19-bookworm	1m 12s
14.19 (force deb build)	11m 49s
17.6 (force deb build)	12m 55s
15.14 (force deb build)	12m 20s
14.19-bookworm (force deb build)	11m 48s
13.22-alpine3.21	5m 4s
13.22-bookworm (force deb build)	11m 19s
13.22-alpine3.22	5m 15s
16.10-bookworm (force deb build)	12m 27s
13.22 (force deb build)	11m 33s
14.19-alpine3.21	5m 25s
	3h 52m 36s

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