feat: update example for runway video

Author: TAnd-dev

shared/snippets/runway/create-video-character-performance-generation/js.hbs

@@ -13,7 +13,7 @@ const main = async () => {
       },
       reference: {
         type: 'video',
-        url: 'https://www.shutterstock.com/shutterstock/videos/1068048734/preview/stock-footage-cheerful-businessman-talking-on-the-phone-on-a-green-screen-chroma-key.webm',
+        url: 'https://videos.pexels.com/video-files/3044160/3044160-uhd_2560_1440_24fps.mp4',
       }
     }),
   }).then((res) => res.json());

shared/snippets/runway/create-video-character-performance-generation/py.hbs

@@ -11,7 +11,7 @@ def main():
         },
         "reference": {
             "type": "video",
-            "url": "https://www.shutterstock.com/shutterstock/videos/1068048734/preview/stock-footage-cheerful-businessman-talking-on-the-phone-on-a-green-screen-chroma-key.webm",
+            "url": "https://videos.pexels.com/video-files/3044160/3044160-uhd_2560_1440_24fps.mp4",
         }
     }
     headers = {"Authorization": "Bearer {{apiKey}}", "Content-Type": "application/json"}