docs: Update the requirements and fix the build

Signed-off-by: John DeNisco <jdenisco@cisco.com>
Change-Id: I30e37f7e549083337b11ace95b4ff4f427d9fc8c
diff --git a/docs/conf.py b/docs/conf.py
index 68dab30..6d8ed9f 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -40,8 +40,10 @@
 extensions = [
     'sphinx.ext.autodoc',
     'sphinx.ext.viewcode',
-    'recommonmark',
-    'sphinxcontrib.spelling']
+    'recommonmark']
+
+# This is currently breaking the build
+####    'sphinxcontrib.spelling']
 
 spelling_word_list_filename = 'spelling_wordlist.txt'
 # Add any paths that contain templates here, relative to this directory.