update_manager: require at least two parts in a tag

Allowing only a single part in the regex resulted in repos
without tags being assigned erronous version info.  With
this change, the following tags can be parsed:

v1.0
v1.0.2
1.0
1.0.2

Signed-off-by:  Eric Callahan <arksine.code@gmail.com>

moonraker/components/update_manager/git_deploy.py

@@ -264,7 +264,7 @@ GIT_REF_FMT = (
 )
 
 class GitRepo:
-    tag_r = re.compile(r"(v?\d+(?:\.\d+){0,2}(-(alpha|beta)(\.\d+)?)?)(-\d+)?")
+    tag_r = re.compile(r"(v?\d+(?:\.\d+){1,2}(-(alpha|beta)(\.\d+)?)?)(-\d+)?")
     def __init__(self,
                  cmd_helper: CommandHelper,
                  git_path: pathlib.Path,