Unify version output format

bjk7119 · bjk7119 · commit baec3669e468 · 2023-01-12T10:58:22.000+09:00
diff --git a/src/fosslight_source/_help.py b/src/fosslight_source/_help.py
@@ -31,7 +31,7 @@
 
 
 def print_version(pkg_name):
-    print_package_version(pkg_name, "FOSSLight Source Scanner Version")
+    print_package_version(pkg_name, "FOSSLight Source Scanner Version:")
 
 
 def print_help_msg_source_scanner():
