Minor modification in upgrade docs for better clarity

Author: sidkrishna

docs/source/install/upgrades.rst

@@ -28,10 +28,7 @@ Upgrade Procedure
 
    sudo st2ctl stop
 
-2. Run the migration script (if any). See section below for |st2|
-   version-specific migration scripts.
-
-3. Upgrade |st2| packages (``st2``, ``st2web``, ``st2chatops``, ``st2mistral``
+2. Upgrade |st2| packages (``st2``, ``st2web``, ``st2chatops``, ``st2mistral``
    and ``bwc-enterprise`` using distro specific tools.
 
   Ubuntu:
@@ -46,6 +43,9 @@ Upgrade Procedure
 
      sudo yum update $PKG_NAME
 
+3. Run the migration script (if any). See section below for |st2| 
+   version-specific migration scripts.
+
 4. Upgrade Mistral database.
 
 .. sourcecode:: bash

docs/source/upgrade_notes.rst

@@ -22,7 +22,7 @@ Upgrade Notes
       1. Use ``yum`` or ``apt-get`` to upgrade to the newest version.
 
       2. Update community packs to the latest version from
-         `StackStorm Exchange <https://exchange.stackstorm.org/>`__.
+         `StackStorm Exchange <https://exchange.stackstorm.org/>`__ with ``st2 pack install <pack>``.
 
       3. Reload the content with ``st2ctl reload``.