Fix CMRA category in the docs.

docs/algebra.tex

@@ -253,7 +253,7 @@ Furthermore, discrete cameras can be turned into RAs by ignoring their COFE stru
 \end{defn}
 
 \begin{defn}
-  The category $\CMRAs$ consists of cameras as objects, and monotone functions as arrows.
+  The category $\CMRAs$ consists of cameras as objects, and camera morphisms as arrows.
 \end{defn}
 Note that every object/arrow in $\CMRAs$ is also an object/arrow of $\OFEs$.
 The notion of a locally non-expansive (or contractive) bifunctor naturally generalizes to bifunctors between these categories.