fixed typo

src/main/java/com/zipcodewilmington/bakery/Controllers/MuffinController.java

@@ -29,7 +29,7 @@ public class MuffinController {
         return new ResponseEntity<>(this.muffinRepository.save(muffin), HttpStatus.CREATED);
     }
 
-    @RequestMapping(value = "/muffin/id", method=RequestMethod.PUT)
+    @RequestMapping(value = "/muffins/id", method=RequestMethod.PUT)
     public ResponseEntity<Muffin> update(@PathVariable Long id, @RequestBody Muffin muffin) {
         Muffin foundMuffin = muffinRepository.findById(id).get();
         foundMuffin.setFlavor(muffin.getFlavor());