update Acknowledgements

iOSClient/Settings/Acknowledgements.rtf

@@ -221,12 +221,12 @@ Copyright (c) Xmartlabs ( http://xmartlabs.com )\
 ____________________________________________\
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-\f1\b TOScrollBar
+\f1\b FastScroll
 \f0\b0 \
 \
 The MIT License (MIT)\
 \
-Copyright (c) Tim Oliver\
+Copyright (c) Frichti\
 ____________________________________________\
 \