[3.12] pythongh-123905: Update TOML description to include version nu…

…mber (pythonGH-123906) (python#123907)

Doc/library/tomllib.rst

@@ -13,7 +13,7 @@
 
 --------------
 
-This module provides an interface for parsing TOML (Tom's Obvious Minimal
+This module provides an interface for parsing TOML 1.0.0 (Tom's Obvious Minimal
 Language, `https://toml.io <https://toml.io/en/>`_). This module does not
 support writing TOML.