Tweak deprecation comment

Author: ToucheSir

src/deprecations.jl

@@ -72,7 +72,7 @@ LSTMCell(in::Integer, out::Integer; kw...) = LSTMCell(in => out; kw...)
 GRUCell(in::Integer, out::Integer; kw...) = GRUCell(in => out; kw...)
 GRUv3Cell(in::Integer, out::Integer; kw...) = GRUv3Cell(in => out; kw...)
 
-# Deprecate Optimisers with old naming convention
+# Optimisers with old naming convention
 @deprecate ADAM Adam
 @deprecate NADAM NAdam
 @deprecate ADAMW AdamW