TS should ignore github: files (#172603)

Fixes #172597

extensions/typescript-language-features/src/utils/fileSchemes.ts

@@ -9,6 +9,8 @@ import * as vscode from 'vscode';
 export const file = 'file';
 export const untitled = 'untitled';
 export const git = 'git';
+export const github = 'github';
+
 /** Live share scheme */
 export const vsls = 'vsls';
 export const walkThroughSnippet = 'walkThroughSnippet';
@@ -30,5 +32,6 @@ export const semanticSupportedSchemes = isWeb() && vscode.workspace.workspaceFol
  */
 export const disabledSchemes = new Set([
 	git,
-	vsls
+	vsls,
+	github,
 ]);