chore(docs): fix transport README

Author: daniel-sanche

gapic/templates/%namespace/%name_%version/%sub/services/%service/transports/README.rst.j2

@@ -2,9 +2,10 @@
 transport inheritance structure
 _______________________________
 
-`{{ service.name }}Transport` is the ABC for all transports.
-- public child `{{ service.name }}GrpcTransport` for sync gRPC transport (defined in `grpc.py`).
-- public child `{{ service.name }}GrpcAsyncIOTransport` for async gRPC transport (defined in `grpc_asyncio.py`).
-- private child `_Base{{ service.name }}RestTransport` for base REST transport with inner classes `_BaseMETHOD` (defined in `rest_base.py`).
-- public child `{{ service.name }}RestTransport` for sync REST transport with inner classes `METHOD` derived from the parent's corresponding `_BaseMETHOD` classes (defined in `rest.py`).
-{# Since the service mixins have a similar structure, we factor out shared code into `_shared_macros.j2` to avoid duplication. #}
+``{{ service.name }}Transport`` is the ABC for all transports.
+
+- public child ``{{ service.name }}GrpcTransport`` for sync gRPC transport (defined in ``grpc.py``).
+- public child ``{{ service.name }}GrpcAsyncIOTransport`` for async gRPC transport (defined in ``grpc_asyncio.py``).
+- private child ``_Base{{ service.name }}RestTransport`` for base REST transport with inner classes ``_BaseMETHOD`` (defined in ``rest_base.py``).
+- public child ``{{ service.name }}RestTransport`` for sync REST transport with inner classes `METHOD` derived from the parent's corresponding ``_BaseMETHOD`` classes (defined in ``rest.py``).
+{# Since the service mixins have a similar structure, we factor out shared code into ``_shared_macros.j2`` to avoid duplication. #}