Missed "/" from line 47 for genieacs-ext path

I omitted the "/" on the initial commit for the SPAWN error on extensions

lib/extensions.ts

@@ -44,7 +44,7 @@ export function run(args): Promise<{ fault: Fault; value: any }> {
     jobs.set(id, resolve);
 
     if (!processes[scriptName]) {
-      const p = spawn(ROOT_DIR + "bin/genieacs-ext", [scriptName], {
+      const p = spawn(ROOT_DIR + "/bin/genieacs-ext", [scriptName], {
         stdio: ["inherit", "inherit", "inherit", "ipc"]
       });
       processes[scriptName] = p;