add to readme

UrumbotXYZ/fixed_axis/README.md

@@ -119,8 +119,8 @@ Kevlar string wrapped around stepper axle, tension in string opposed by spindle
  - The xy stage by itself has dF/dy ~ 40 N/mm.  With wax block on table, at the top of the block dF/dy = 30 N/mm.  Extra compliance is due to rotation about the single x-beam as a function of sideways flex of bearings.  
  - Applied kevlar string to the xy stage.  Now the stiffness of the stage, dF/dy, has doubled to 80 N/mm.  When the table is added, and a wax block attached, the stiffness at the top of the block is still low, about 40 N/mm.  Now the 20mm width of the x-beam is the limiting design parameter.
 
-[Youtube video of was milling](https://youtube.com/shorts/Uz45yHX_n6A?feature=share)
-<img src=./img/milled_wax.jpg width=40%>
+[Youtube video of wax milling](https://youtube.com/shorts/Uz45yHX_n6A?feature=share)
+<img src=./img/milled_wax.jpg width=30%>
 <img src=./img/adjuster.jpg width=40%>
 
 #### Next steps.