Update peek.adoc

CamelCase

Author: SimonePDA

Language/Functions/Communication/Serial/peek.adoc

@@ -60,7 +60,7 @@ The first byte of incoming serial data available (or -1 if no data is available)
 * #LANGUAGE# link:../println[println()] +
 * #LANGUAGE# link:../write[write()] +
 * #LANGUAGE# link:../serialEvent[SerialEvent()] +
-* #LANGUAGE# link:../../stream/streamPeek[Stream.peek()]
+* #LANGUAGE# link:../../stream/streampeek[Stream.peek()]
 
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 // SEE ALSO SECTION ENDS