The installation instructions of a Maven package places the `url` child
of the `repository` node in an extra indentation level. This indentation
is unnecesary since both the `id` and `url` nodes are direct children of
the `repository` node.
This commit removes the unnecessary indentation.
Refs: https://codeberg.org/forgejo/forgejo/pulls/1534
(cherry picked from commit 82f0ddad7bfcb40595d0f79220834377b04382d8)
(cherry picked from commit 905e546549bc69460d93f6e30bbe93124e924e57)
(cherry picked from commit 4e58ab82b77a8f4e6f994fc21b42fb70f0629778)
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(cherry picked from commit ca8565450c319c073e093b22180ef6c29461e281)
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(cherry picked from commit fc1e529894f175550f5f88ee39a58c139337c6ee)
(cherry picked from commit ef8810c09db4d2c539655f1ac07da8149fda94c9)
(cherry picked from commit a2d1459c4d1fc6e9995bbdedbcf6a053d7370bc2)
(cherry picked from commit 30e0d7bff00be21eee6d233c0d50c443a3c466a0)
(cherry picked from commit ccb9ed98b9b7cb8a9223b3d787c4d861c82ab0eb)
(cherry picked from commit 3782794fb41e5c205800a558556e961f96ecc55b)
(cherry picked from commit 9e7d5b5de9d381360cd3164649990ce4397fff02)
(cherry picked from commit 50687eaebe34421557c737b29e370c9128bc557b)
(cherry picked from commit 28ae93f18e5d3f13b8c6e5192ecb35123f0172e6)
(cherry picked from commit e59f46728466a05fab38d7f8999be6798bacb723)
(cherry picked from commit 5e24444bfaf3a3f3e170c9dd1c7dd3b66539fa42)
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