Fix FAQs spelling

Change-Id: I53f69875cc8e82e39602f0aae80e30d456c933c1

docs/source/faqs.rst

diff --git a/docs/source/faqs.rst b/docs/source/faqs.rst
index 65c64e6..71dc27b 100644
--- a/docs/source/faqs.rst
+++ b/docs/source/faqs.rst
@@ -5,7 +5,7 @@
 .. cpp:namespace:: ceres
 
 ===================
-FAQS, Tips & Tricks
+FAQs, Tips & Tricks
 ===================
 
 Answers to frequently asked questions, tricks of the trade and general