update cliDefaultVersion to 2.2.6

Author: BenAlvo1

src/main/osinstaller/CxInstaller.ts

@@ -14,7 +14,7 @@ export class CxInstaller {
     private readonly platform: string;
     private cliVersion: string;
     private readonly resourceDirPath: string;
-    private readonly cliDefaultVersion = '2.2.5'; // This will be used if the version file is not found. Should be updated with the latest version.
+    private readonly cliDefaultVersion = '2.2.6'; // This will be used if the version file is not found. Should be updated with the latest version.
     private static installSemaphore = new Semaphore(1);  // Semaphore with 1 slot
 
     constructor(platform: string) {