Apply exercise 5 fix to source

source/exercises100.ktx

@@ -47,7 +47,7 @@ How to get the documentation of the numpy add function from the command line? (
 hint: np.info
 
 < a5
-%run `python -c "import numpy; numpy.info(numpy.add)"`
+!python -c "import numpy; numpy.info(numpy.add)"
 
 < q6
 Create a null vector of size 10 but the fifth value which is 1 (★☆☆)