Fix typos

Signed-off-by: Danila Fedorin <danila.fedorin@gmail.com>

content/blog/08_spa_agda_forward/index.md

@@ -207,7 +207,7 @@ At first, the exercise may not obviously correspond to the bulk operation
 I've described. Particularly confusing is the fact that it has two lattices,
 \(L_1\) and \(L_2\). In fact, the exercise results in a very general theorem;
 we can exploit a more concrete version of the theorem by setting
-\(L_1 \triangleq A \to L_2\), resulting in an overal signature for \(f\) and \(h\):
+\(L_1 \triangleq A \to L_2\), resulting in an overall signature for \(f\) and \(h\):
 
 {{< latex >}}
 f : (A \to L_2) \to (A \to L_2)