Update app.py

app.py

@@ -103,7 +103,7 @@ if lang is not None:
   if t_obsolete_codes:
     st.write(f"Obsolete codes from previous ISO-639 iterations, pulled from https://iso639-3.sil.org/code/{t_variant}:")
     st.write(t_obsolete_codes)
-  else if b_obsolete_codes:
+  elif b_obsolete_codes:
     st.write(f"Obsolete codes from previous ISO-639 iterations, pulled from https://iso639-3.sil.org/code/{b_variant}:")
     st.write(b_obsolete_codes )