docs: add guide to update vulnerability data

docs/howtoguides.rst

@@ -57,6 +57,7 @@ Vulnerability commands
 
    Display USNs that affectt the system... <howtoguides/how_to_display_usns_that_affect_the_system>
    Provide manifest file to commands...  <howtoguides/how_to_use_manifest_file_for_pro_vulnerability>
+   Update vulnerability data... <howtoguides/how_to_update_vulnerability_data>
 
 Use the Pro Client
 ==================

docs/howtoguides/how_to_update_vulnerability_data.rst

@@ -0,0 +1,43 @@
+How to update vulnerability data on the machine?
+************************************************
+
+When running the ``pro vulnerability list`` you might see an alert like this:
+
+.. code-block:: text
+
+    The vulnerabilities data used in the system is outdated by NUM days/hours
+    To update the data please run with --update:
+
+        pro vulnerability list --update
+
+This same behavior can happen when running ``pro vulnerability show``. This indicates
+that our data source for the vulnerability commands is outdated in the machine.
+
+To update it, you can follow the instructions mentioned in the warning or you
+can run the following command as well:
+
+.. code-block:: bash
+
+    pro vulnerability update
+
+The main purpose of this command is to just allow you to update that datasource.
+When we detect a new version of this datasource, you should see an output like this:
+
+.. code-block:: text
+
+    Checking for the availability of newer vulnerability data.
+    Please wait a moment while we verify if a new version is ready for download.
+    
+    Found a newer version of the data.
+    Fetching and processing the new data…
+    
+    ✔ Vulnerability data in the system is now up-to-date
+
+And if you there is no new version of the datasource:
+
+.. code-block:: text
+
+    Checking for the availability of newer vulnerability data.
+    Please wait a moment while we verify if a new version is ready for download.
+    
+    ✔ Vulnerability data in the system is already up-to-date