update_manager: relax semantic tag requirement

Allow tags versions with one, two, or three parts.  The following
examples are now valid:

v1
v1.3
v1.0,10

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