docs: Adds links related to logging samples in README.rst.j2

Provides three links to logging documentation and samples in `README.rst.j2`

* Docs
* Generated samples
* Legacy OR handwritten samples

Author: chalmerlowe

gapic/templates/README.rst.j2

@@ -141,3 +141,17 @@ Logging details
 #. The Google-specific logging configurations (default handlers for environment-based configuration; not propagating logging events to the root logger) get
    executed the first time *any* client library is instantiated in your application, and only if the affected loggers have not been previously configured.
    (This is the reason for 2.i. above.)
+
+
+Additional information
+~~~~~~~~~~~~~~~~~~~~~~
+
+For additional information and examples about logging see:
+
+- `Logging Docs`_
+- `Generated samples`_
+- `Additional samples`_
+
+.. _Logging Docs: https://docs.cloud.google.com/logging/docs
+.. _Generated samples: https://github.com/googleapis/google-cloud-python/tree/main/packages/google-cloud-logging/samples/generated_samples
+.. _Additional samples: https://github.com/GoogleCloudPlatform/python-docs-samples/tree/main/logging