Docs: Inserted a comma for better readability (#24198)

docs/sources/variables/templates-and-variables.md

@@ -48,7 +48,7 @@ Panel titles and metric queries can refer to variables using two different synta
   Example: apps.frontend.[[server]].requests.count
   Example: apps.frontend.[[server]].requests.count
 
 
 Before queries are sent to your data source the query is _interpolated_, meaning the variable is replaced with its current value. During
 Before queries are sent to your data source the query is _interpolated_, meaning the variable is replaced with its current value. During
-interpolation the variable value might be _escaped_ in order to conform to the syntax of the query language and where it is used.
+interpolation, the variable value might be _escaped_ in order to conform to the syntax of the query language and where it is used.
 For example, a variable used in a regex expression in an InfluxDB or Prometheus query will be regex escaped. Read the data source specific
 For example, a variable used in a regex expression in an InfluxDB or Prometheus query will be regex escaped. Read the data source specific
 documentation topic for details on value escaping during interpolation.
 documentation topic for details on value escaping during interpolation.