Update NEWS.md

Author: OlivierHnt

NEWS.md

@@ -2,7 +2,7 @@
 
 ## 0.22.4
 - no longer generate the ITF1788 test suite automatically, no longer write a log for the warnings of the tests (cf. PR [#607](https://github.com/JuliaIntervals/IntervalArithmetic.jl/pull/607))
-- add plotting recipes as an extension (cf. [#608](https://github.com/JuliaIntervals/IntervalArithmetic.jl/pull/608))
+- add plotting recipes as an extension (cf. PR [#608](https://github.com/JuliaIntervals/IntervalArithmetic.jl/pull/608))
 
 ## 0.22.3