libdrm: fix update-check

[Bnyro]

Testing the changes

• I tested the changes in this PR: YES

[Chocimier]

Works as intended, this looks for downloadable archive.

XBPS_UPDATE_CHECK_VERBOSE=1 ./xbps-src update-check libdrm
using libdrm/update overrides
fetching https://dri.freedesktop.org/ and scanning with (?<!-)\b\Qdrm-libdrm\E[-_]?((src|source)[-_])?v?\K([^-/_\s]*?\d[^-/_\s]*?)(?=(?:[-_.](?:src|source|orig))?\.(?:[jt]ar|shar|t[bglx]z|tbz2|zip))\b
fetching https://gitlab.freedesktop.org/mesa/drm/-/tags and scanning with /archive/[^/]+/\Qdrm-libdrm\E-v?\K[\d.]+(?=\.tar\.gz")
found version 2.4.96
found version 2.4.97
found version 2.4.98
found version 2.4.99
found version 2.4.100
found version 2.4.101
found version 2.4.102
found version 2.4.103
found version 2.4.104
found version 2.4.105
found version 2.4.106
found version 2.4.107
found version 2.4.108
found version 2.4.109
found version 2.4.110
found version 2.4.111
found version 2.4.112
found version 2.4.113
found version 2.4.114
found version 2.4.115