Update linear-step-size.md (#11997)

hover: {
      mode: 'index',
      intersec: false
    },

corrected the spelling of intersect.

Author: prems51

Diff for: docs/samples/scales/linear-step-size.md

@@ -106,7 +106,7 @@ const config = {
     },
     hover: {
       mode: 'index',
-      intersec: false
+      intersect: false
     },
     scales: {
       x: {