[8.15](backport #4119) Add missing dash in probabilistic profiling docs

docs/en/observability/profiling-probabilistic-profiling.asciidoc

@@ -8,7 +8,7 @@ Profiling Events linearly correlate with the probabilistic profiling value. The
 [discrete]
 == Configure probabilistic profiling
 
-To configure probabilistic profiling,  set the `-probabilistic-threshold` and `probabilistic-interval` options.
+To configure probabilistic profiling,  set the `-probabilistic-threshold` and `-probabilistic-interval` options.
 
 Set the `-probabilistic-threshold` option to a unsigned integer between 1 and 99 to enable probabilistic profiling. At every probabilistic interval, a random number
 between 0 and 99 is chosen. If the probabilistic threshold that you've set is greater than this random