MissingRemoteId: Simplify _gitlab_match to avoid false positives

https://gitlab.com/api/v4/projects/37881342/packages/generic/spicetify-cli/2.27.1/spicetify-cli-2.27.1-deps.tar.xz

Before: api/v4/projects/37881342/packages/generic/spicetify-cli/2.27.1/spicetify-cli-2.27.1-deps.tar.xz
After: api/v4

Signed-off-by: Alfred Wingate <parona@protonmail.com>

src/pkgcheck/checks/metadata_xml.py

@@ -645,7 +645,8 @@ class MissingRemoteIdCheck(Check):
     _source = sources.PackageRepoSource
     known_results = frozenset([MissingRemoteId])
 
-    _gitlab_match = r"(?P<value>(\w[^/]*/)*\w[^/]*/\w[^/]*)"
+    # https://docs.gitlab.com/ee/user/reserved_names.html#limitations-on-project-and-group-names
+    _gitlab_match = r"(?P<value>\w[^/]*\w/\w[^/]*\w)"
 
     remotes_map = (
         ("bitbucket", r"https://bitbucket.org/(?P<value>[^/]+/[^/]+)"),