Bumping the UG repo rev for RST syntax.

An RST error in a footnote in Wave Energy was breaking the binary builds
in the main InVEST repository.  This is now addressed. RE:natcap#1641

Makefile

@@ -10,7 +10,7 @@ GIT_TEST_DATA_REPO_REV      := 324abde73e1d770ad75921466ecafd1ec6297752
 
 GIT_UG_REPO                 := https://github.com/natcap/invest.users-guide
 GIT_UG_REPO_PATH            := doc/users-guide
-GIT_UG_REPO_REV             := 0404bc5d4d43085cdc58f50f8fc29944b10cefb1
+GIT_UG_REPO_REV             := f203ec069f9f03560c9a85b268e67ebb6b994953
 
 ENV = "./env"
 ifeq ($(OS),Windows_NT)