add clarifications about git-annex

Author: xuyg16

docs/faq.md

@@ -25,4 +25,7 @@ __7. Can you upload to any other portals apart from Dataverse?__
 
 
 __8. How do you handle data licensing?__
-Answer : Data license depends on the repository and can typically be chosen by the user typically upon making the dataset publicly available (or a data user agreement form can be employed). That being said, at OpenNeuro data is typically licensed CC0. 
+- Data license depends on the repository and can typically be chosen by the user typically upon making the dataset publicly available (or a data user agreement form can be employed). That being said, at OpenNeuro data is typically licensed CC0. 
+
+__9. Troubleshooting: Datalad push to Dataverse command failed.__
+- You might encounter errors such as: 'GitRepo' object has no attribute 'call_annex' and 'Datalad push command failed', this is because `git-annex` is required but not a Python package, and it needs to be installed sepearatly, run: `datalad-installer git-annex` after installing requirements.

docs/tutorial.md

@@ -15,6 +15,11 @@ git clone https://github.com/s-ccs/LSLAutoBIDS.git
     cd LSLAutoBIDS
     pip install .
 ```
+  `git-annex` is required but not a Python package. You need to install it separately after installing the requirements, either with your system’s package manager or simply by running:
+```
+datalad-installer git-annex
+```
+
 3. Download the dummy dataset for testing in the LSLAutoBIDS root directory - ([tutorial_sample_dataset](https://files.de-1.osf.io/v1/resources/wz7g9/providers/osfstorage/68c3c636e33eca3b0feffa2c/?zip=))
 
 The dataset has a sample project called "test-project" which contains an EEG recording file in the projects directory, a sample eyetracking recording in the `project_stimulus/data` directory, and a dummy experimental code file in the `project_stimulus/experiment` directory.