Fix completion of hyphenated items (#12035)

VSCode will dismiss and re-invoke completion and when a trigger character is typed. That's completely different from how VS client handles trigger characters. Removing hyphen from trigger characters fixes this behavior and allowed proper filtering and completoin of such items.

Author: alexgav

src/Razor/src/Microsoft.CodeAnalysis.Razor.Workspaces/Completion/CompletionTriggerAndCommitCharacters.cs

@@ -15,7 +15,7 @@ internal class CompletionTriggerAndCommitCharacters
     private const char TransitionCharacter = '@';
 
     private static readonly char[] s_vsHtmlTriggerCharacters = [':', '#', '.', '!', '*', ',', '(', '[', '-', '<', '&', '\\', '/', '\'', '"', '=', ':', ' ', '`'];
-    private static readonly char[] s_vsCodeHtmlTriggerCharacters = ['#', '.', '!', ',', '-', '<'];
+    private static readonly char[] s_vsCodeHtmlTriggerCharacters = ['#', '.', '!', ',', '<'];
     private static readonly char[] s_razorTriggerCharacters = ['<', ':', ' '];
     private static readonly char[] s_csharpTriggerCharacters = [' ', '(', '=', '#', '.', '<', '[', '{', '"', '/', ':', '~'];
     private static readonly ImmutableArray<string> s_commitCharacters = [" ", ">", ";", "="];