Update requirements.txt (#780)

* Update requirements.txt with commented procedures for our internal doc team.

Co-authored-by: Anastasia Alexandrova <[email protected]>

Author: Andriciuc

requirements.txt

@@ -1,4 +1,13 @@
-
+# This file is used to install the required packages for the doc project.
+# Ensure you are in the same location/root that the requirements.txt file is in. 
+# It is recommended to use Windows Powershell in Administrator mode or Linux Terminal to run the commands.
+# You can install the required packages using the following command:
+# pip install -r requirements.txt
+# This will install all the packages listed in this file.
+# To update the packages, run the following command:
+# pip install --upgrade -r requirements.txt
+# To check for outdated packages, run the following command:
+# pip list --outdated
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 mkdocs
 mkdocs-versioning