docs: Fix invalid language support table (#1161)

Author: kyleconroy

docs/reference/language-support.rst

@@ -1,21 +1,21 @@
 Database and Language Support
 #############################
 
-========  ======        ==========
+========  ============  ============
 Language  MySQL         PostgreSQL
---------  ------        ----------
+========  ============  ============
 Go        Stable        Stable
 Kotlin    Beta          Beta
 Python    Experimental  Experimental
-========  ============  ==========
+========  ============  ============
 
-Planned Language Support
+Future Language Support
 ************************
 
 - `C# <https://github.com/kyleconroy/sqlc/issues/373>`_
 - `TypeScript <https://github.com/kyleconroy/sqlc/issues/296>`_
 
-Planned Database Support
+Future Database Support
 ************************
 
 - `SQLite <https://github.com/kyleconroy/sqlc/issues/161>`_