🏗🐛 Fix non-dist build of Bento extensions (#37665)

Error:
```
/Users/alanorozco/git/amphtml/build-system/compile/bento-remap.js:112
    Object.entries(isMinified).map(([source, cdn]) => [
           ^

TypeError: Cannot convert undefined or null to object
```

build-system/compile/bento-remap.js

@@ -109,7 +109,7 @@ function getRemapBentoDependencies(isMinified) {
     return remappings;
   }
   return Object.fromEntries(
-    Object.entries(isMinified).map(([source, cdn]) => [
+    Object.entries(remappings).map(([source, cdn]) => [
       source,
       cdn.replace('.mjs', '.max.mjs'),
     ])