fixed a small typo in the first example of the dx,dy,dz arguments section

z-87 was changed to z=87

Author: SwitchedCube

src/routes/wiki/concepts/target-selectors/+page.svx

@@ -182,7 +182,7 @@ dx/dz/dz=0 will always stretch from the command origin to positive x/y/z
 **Examples**:
 
 - `@e[x=10,y=13,z=87,dx=10,dy=20,dz=5]`: Selects any entities if any part of their hit box is within the cuboid
-  `w=11,h=21,l=6` starting from the position `x=10,y=13,z-87`
+  `w=11,h=21,l=6` starting from the position `x=10,y=13,z=87`
 - `@e[x=7,y=3,z=9,dx=0,dy=0,dz=0]`: Selects any entities if their hit box overlaps with the block at `x=7,y=3,z=9`
 
 ### `tag` argument