[receiver/sqlquery] Update README to reflect both logs and metrics generation (open-telemetry#43900)

#### Description
This PR fixes a documentation bug in the first section of the README
file which currently omits logs. That leads to wrong conclusion the
receiver can work with metrics only.

Author: perk

receiver/sqlqueryreceiver/README.md

@@ -16,9 +16,9 @@
 [contrib]: https://github.com/open-telemetry/opentelemetry-collector-releases/tree/main/distributions/otelcol-contrib
 <!-- end autogenerated section -->
 
-The SQL Query Receiver uses custom SQL queries to generate metrics from a database connection.
+The SQL Query Receiver uses custom SQL queries to generate logs and/or metrics from a database connection.
 
-> :construction: This receiver is in **ALPHA**. Behavior, configuration fields, and metric data model are subject to
+> :construction: This receiver is in **ALPHA**. Behavior, configuration fields, and log or metric data model are subject to
 > change.
 
 ## Configuration