Change ENV key name to specify ml5-library usage

Author: bomanimc

.env.example

@@ -10,9 +10,9 @@ EXAMPLE_USER_PASSWORD=hellop5js
 GG_EXAMPLES_USERNAME=generativedesign
 GG_EXAMPLES_EMAIL=benedikt.gross@generative-gestaltung.de
 GG_EXAMPLES_PASS=generativedesign
-ML5_EXAMPLES_USERNAME=ml5
-ML5_EXAMPLES_EMAIL=examples@ml5js.org
-ML5_EXAMPLES_PASS=helloml5
+ML5_LIBRARY_USERNAME=ml5
+ML5_LIBRARY_EMAIL=examples@ml5js.org
+ML5_LIBRARY_PASS=helloml5
 GITHUB_ID=<your-github-client-id>
 GITHUB_SECRET=<your-github-client-secret>
 GOOGLE_ID=<your-google-client-id> (use google+ api)