Apply suggestions from 2nd Clayton's code review

Co-authored-by: Clayton Cornell <[email protected]>

docs/sources/reference/components/prometheus.scrape.md

@@ -259,7 +259,7 @@ present.
 
 ## Example
 
-### Setting up scrape jobs of `blackbox exporter` targets  
+### Set up scrape jobs for `blackbox exporter` targets  
 
 The following example sets up the scrape job with certain attributes (scrape
 endpoint, scrape interval, query parameters) and lets it scrape two instances