Rename all mentions of hex into oct

Signed-off-by: Kozova1 <mug66kk@gmail.com>

README.md

@@ -29,5 +29,5 @@ It seems as though the output for the stepper can be switched to the other side
 
 These plates are meant to work with mounting posts, similar to the strain relief on Voron v0.  The extruder motor gets mounted with screws that are 5mm longer than called for(so they protrude from the back).  Each end of the printed standoff post gets an M3 heatset insert.  Mounting post length should be chosen based on the motor you are using.  Measure the distance from the back of the motor to the back side of the mounting ears.  Add .5-1mm so the board mount isnt touching the motor, and print the corresponding post length from the folder.  The post is screwed onto the protruding motor mounting screw, and then the mounting bracket is screwed into the mounting posts.  Then you mount the board on the bracket.  The brackets with different board and motor screw orientations will require heatsets in the bracket, to mount the board.  Better documentation will be forthcoming.
 
-There are 3 styles of standoff posts available.  They print in the orientation shown.  The classic round ones are fine as long as you print hot enough that layer adhesion is strong.  Geometry is in place to allow the internal overhang to print easily.  If that makes you uneasy, choose the hex or teardrop shapes and print them lying down as shown.  
+There are 3 styles of standoff posts available.  They print in the orientation shown.  The classic round ones are fine as long as you print hot enough that layer adhesion is strong.  Geometry is in place to allow the internal overhang to print easily.  If that makes you uneasy, choose the oct or teardrop shapes and print them lying down as shown.  
 ![](images/mounting_post_types.png)