sort syntax node templates by name

Author: kimdv

Sources/SwiftSyntax/SyntaxNodes.swift.gyb.template

@@ -29,7 +29,7 @@ nodes whose base kind are that specified kind.
 """
 }%
 
-% for node in SYNTAX_NODES:
+% for node in sorted(SYNTAX_NODES, key=lambda x: x.name):
 %   base_type = node.base_type
 %   if node.is_base():
 %     # Handled in SyntaxNodesBase.swift.gyb