📖 Add run one test example to SAT readme (#22292)

Author: bnchrch

airbyte-integrations/bases/connector-acceptance-test/README.md

@@ -1,27 +1,35 @@
 # Connector Acceptance Tests
-This package gathers multiple test suites to assess the sanity of any Airbyte connector. 
+This package gathers multiple test suites to assess the sanity of any Airbyte connector.
 It is shipped as a [pytest](https://docs.pytest.org/en/7.1.x/) plugin and relies on pytest to discover, configure and execute tests.
 Test-specific documentation can be found [here](https://docs.airbyte.com/connector-development/testing-connectors/connector-acceptance-tests-reference/)).
 
 ## Running the acceptance tests on a source connector:
-1. `cd` into your connector project (e.g. `airbyte-integrations/connectors/source-pokeapi`) 
+1. `cd` into your connector project (e.g. `airbyte-integrations/connectors/source-pokeapi`)
 2. Edit `acceptance-test-config.yml` according to your need. Please refer to our [Connector Acceptance Test Reference](https://docs.airbyte.com/connector-development/testing-connectors/connector-acceptance-tests-reference/) if you need details about the available options.
 3. Build the connector docker image ( e.g.: `docker build . -t airbyte/source-pokeapi:dev`)
 4. Use one of the following ways to run tests (**from your connector project directory**)
 
-**Using python**
+### Using python
+_Note: these will assume that docker image for connector is already built_
+
+**Running the whole suite**
 ```bash
 python -m pytest integration_tests -p integration_tests.acceptance
 ```
-_Note: this will assume that docker image for connector is already built_
 
-**Using Gradle**
+**Running a specific test**
+```bash
+python -m pytest integration_tests -p integration_tests.acceptance -k "<TEST_NAME>"
+```
+
+
+### Using Gradle
 ```bash
 ./gradlew :airbyte-integrations:connectors:source-<name>:connectorAcceptanceTest
 ```
 _Note: this way will also build docker image for the connector_
 
-**Using Bash**
+### Using Bash
 ```bash
 ./acceptance-test-docker.sh
 ```
@@ -67,4 +75,4 @@ To migrate a legacy configuration to the latest configuration format please run:
 python -m venv .venv # If you don't have a virtualenv already
 source ./.venv/bin/activate # If you're not in your virtualenv already
 python connector_acceptance_test/tools/strictness_level_migration/config_migration.py ../../connectors/source-to-migrate/acceptance-test-config.yml
-```
+```