Update canvasFallback.js

Author: haehn

src/frameworks/canvasFallback.js

@@ -115,7 +115,7 @@ export class CanvasFallback extends Framework {
   select_box(callback) {
     let scriptBoxCraft = document.createElement("script");
     scriptBoxCraft.type = "text/javascript";
-    scriptBoostlet.src = "https://boostlet.org/dist/boxcraft.min.js";
+    scriptBoxCraft.src = "https://boostlet.org/dist/boxcraft.min.js";
     // scriptBoxCraft.src = "https://shrutivarade.github.io/BoxCraft/dist/boxCraft.min.js";
     // scriptBoxCraft.src = "https://shrutivarade.github.io/boostlet/dist/boxcraft.min.js";
     // scriptBoxCraft.src = "http://localhost:8000/dist/boxcraft.min.js";
@@ -132,4 +132,4 @@ export class CanvasFallback extends Framework {
 
   }
 
-}
+}