Refine exceptions handled while reading data from COMMIT and VERSION

Signed-off-by: Tobias Wolf <wolf@b1-systems.de>

Author: NotTheEvilOne

src/gardenlinux/features/cname_main.py

@@ -55,8 +55,8 @@ def main():
         try:
             version_data = get_version_and_commit_id_from_files(gardenlinux_root)
             version = f"{version_data[0]}-{version_data[1]}"
-        except:
-            pass
+        except RuntimeError:
+            pass # Final failing of version parsing is handled in cname below
 
     cname = CName(args.cname, arch=arch, version=version)