Fix some small issues in the getting started docs (#30346)
Fix some small issues in the getting started docs (#30346)

* Modified a reference to real time to match the previous line reference of
  realtime.
* Modified eg to e.g. as it's an abbreviation for the latin exempli gratia
* Added missing pronoun to `_executing_filters` section.
vroyer/elassandra,strapdata/elassandra,strapdata/elassandra,vroyer/elassandra,strapdata/elassandra,strapdata/elassandra,strapdata/elassandra,vroyer/elassandra