Fix rst warnings in apex documentation

Issue-ID: POLICY-3132
Change-Id: Ia7a4f136cdaad018ad6ba464ce798ac84ca47185
Signed-off-by: waynedunican <wayne.dunican@est.tech>
diff --git a/docs/apex/APEX-User-Manual.rst b/docs/apex/APEX-User-Manual.rst
index 175f539..c48583a 100644
--- a/docs/apex/APEX-User-Manual.rst
+++ b/docs/apex/APEX-User-Manual.rst
@@ -8,8 +8,8 @@
 .. contents::
     :depth: 3
 
-Installation
-^^^^^^^^^^^^
+Installation of Apex
+^^^^^^^^^^^^^^^^^^^^
 
 Requirements
 ------------
@@ -226,13 +226,14 @@
 +----------------------------------------------------------------------------------------------------------------+
 | Unix, Cygwin                                                                                                   |
 +================================================================================================================+
-| .. container::                                                                                                 |
+| .. container:: content                                                                                         |
 |                                                                                                                |
 | .. container:: listingblock                                                                                    |
 |                                                                                                                |
 | .. container:: content                                                                                         |
 |                                                                                                                |
 | .. code::                                                                                                      |
+|                                                                                                                |
 | :number-lines:                                                                                                 |
 |                                                                                                                |
 | -rwxrwx---+ 1 esvevan Domain Users       772 Sep  3 11:55 apex-pdp-package-full_2.0.0~SNAPSHOT_all.changes*    |