Update sqlite3 instrumentor doc about explicit cursors (open-telemetry#3088)

* Update sqlite3 instrumentor doc about explicit cursors

* Changelog

---------

Co-authored-by: Riccardo Magliocchetti <[email protected]>

Author: tammy-baylis-swi

CHANGELOG.md

@@ -50,6 +50,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   ([#2816](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/2816))
 - `opentelemetry-instrumentation-sqlalchemy`: Fix a remaining memory leak in EngineTracer
   ([#3053](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/3053))
+- `opentelemetry-instrumentation-sqlite3`: Update documentation on explicit cursor support of tracing
+  ([#3088](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/3088))
 
 ### Breaking changes
 

instrumentation/opentelemetry-instrumentation-sqlite3/src/opentelemetry/instrumentation/sqlite3/__init__.py

@@ -14,7 +14,8 @@
 
 """
 SQLite instrumentation supporting `sqlite3`_, it can be enabled by
-using ``SQLite3Instrumentor``.
+using ``SQLite3Instrumentor``. At this time, cursor objects must
+be explicitly initialized as shown below to support tracing.
 
 .. _sqlite3: https://docs.python.org/3/library/sqlite3.html