Update app.py

app.py

@@ -19,6 +19,7 @@ for version in versions:
     with gzip.open(filepath, 'r') as f:
         data = json.load(f)
         for username, repos in data.items():
+            username = username.lower()
             for repo in repos:
                 if repo not in usernames[username]:
                     usernames[username][repo] = []
@@ -77,6 +78,7 @@ def issue_url(username, repos):
     return opt_out_text
 
 def check_username(username, version):
+    username = username.lower()
     output_md = ""
     repos = []
     if username in usernames: