resolving typo in _shame.scss comments

apps/openassessment/xblock/static/sass/oa/utilities/_shame.scss

@@ -8,7 +8,7 @@
   // --------------------
   // LMS countermeasures
   // --------------------
-  // rules ot overcome any poorly defined, scoped, or architected edX LMS-based CSS. Ideally this file will be removed when the LMS Front End is re-visited.
+  // rules to overcome any poorly defined, scoped, or architected edX LMS-based CSS. Ideally this file will be removed when the LMS Front End is re-visited.
 
   // headers
   .self-assessment__display__header, .peer-assessment__display__header, .step__header {
@@ -138,7 +138,7 @@
   // --------------------
   // Studio countermeasures
   // --------------------
-  // rules ot overcome any poorly defined, scoped, or architected edX Studio problem preview/rendering CSS.
+  // rules to overcome any poorly defined, scoped, or architected edX Studio problem preview/rendering CSS.
 
   .ico {
     font-style: normal;