fix: typo in 3.11

Author: ktgw0316

src/content/3.11/kan-extensions.tex

@@ -199,7 +199,7 @@ \section{Kan Extension as Adjunction}
 \section{Left Kan Extension}
 
 There is a dual construction that gives us the left Kan extension. To
-build some intuition, we'll can start with the definition of a colimit
+build some intuition, we'll start with the definition of a colimit
 and restructure it to use the singleton category $\cat{1}$. We build a
 cocone by using the functor $D \Colon \cat{I} \to \cat{C}$ to form its
 base, and the functor $F \Colon \cat{1} \to \cat{C}$ to select its apex.