Update description of C# 8 support

Author: Felicity Chapman

change-notes/support/language-support.rst

@@ -14,7 +14,7 @@ Note that where there are several versions or dialects of a language, the suppor
 .. container:: footnote-group
 
     .. [1] Support for the Arm Compiler (armcc) is preliminary.
-    .. [2] In addition, support for the preview features of C#8 and .NET Core 3.0.
+    .. [2] In addition, support is included for the preview features of C# 8.0 and .NET Core 3.0.
     .. [3] The best results are achieved with COBOL code that stays close to the ANSI 85 standard.  
     .. [4] Builds that execute on Java 6 to 12 can be analyzed. The analysis understands Java 12 language features.
     .. [5] JSX and Flow code, YAML, JSON, HTML, and XML files may also be analyzed with JavaScript files.