[Docs] Add limitation about copying target dir files to remote (#1305)

It’s currently observed that users may assume, after reading the
[documentation](https://astronomer.github.io/astronomer-cosmos/configuration/cosmos-conf.html#remote-target-path),
that all files from the target directory of the dbt project are uploaded
to the remote target directory. However, this isn’t yet the case. The
`remote_target_path` configuration, introduced in PR
#1224, currently
only uploads files from the compiled directory within the target
directory of the dbt project—and only when the execution mode is set to
`ExecutionMode.AIRFLOW_ASYNC`. This PR updates the documentation for
this configuration to clarify this behavior and indicate that additional
files will become available as we expand support for uploading them
within the operators.

closes: #1291

docs/configuration/cosmos-conf.rst

@@ -130,8 +130,12 @@ This page lists all available Airflow configurations that affect ``astronomer-co
 
 `remote_target_path`_:
     (Introduced since Cosmos 1.7.0) The path to the remote target directory. This is the directory designated to
-    remotely copy & store in the files generated and stored by dbt in the dbt project's target directory. The value
-    for the remote target path can be any of the schemes that are supported by the
+    remotely copy & store in the files generated and stored by dbt in the dbt project's target directory.
+    While this remote path is intended to copy files from the dbt project’s target directory, Cosmos currently only
+    supports copying files from the ``compiled`` directory within the ``target`` folder — and only when the execution
+    mode is set to ``ExecutionMode.AIRFLOW_ASYNC``. Future releases will add support for copying additional files from
+    the target directory.
+    The value for the remote target path can be any of the schemes that are supported by the
     `Airflow Object Store <https://airflow.apache.org/docs/apache-airflow/stable/core-concepts/objectstorage.html>`_
     feature introduced in Airflow 2.8.0 (e.g. ``s3://your_s3_bucket/target_dir/``, ``gs://your_gs_bucket/target_dir/``,
     ``abfs://your_azure_container/cache_dir``, etc.)