Update OFL.txt (#132)

See google/fonts#7062 and #129

Author: emmamarichal

OFL.txt

@@ -2,7 +2,7 @@ Copyright 20** The My Font Project Authors (https://github.com/googlefonts/googl
 
 This Font Software is licensed under the SIL Open Font License, Version 1.1.
 This license is copied below, and is also available with a FAQ at:
-https://scripts.sil.org/OFL
+https://openfontlicense.org
 
 
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