chore(css): Fix typo (#975)

Author: skyclouds2001

css/properties.json

@@ -2389,7 +2389,7 @@
     "media": "none",
     "inherited": false,
     "animationType": "byComputedValueType",
-    "percentages": "referTtoTheUsedValueOfLineHeight",
+    "percentages": "referToTheUsedValueOfLineHeight",
     "groups": [
       "CSS Inline"
     ],

css/properties.schema.json

@@ -81,7 +81,7 @@
         "referToSVGViewportSize",
         "referToSVGViewportWidth",
         "referToSVGViewportDiagonal",
-        "referTtoTheUsedValueOfLineHeight",
+        "referToTheUsedValueOfLineHeight",
         "referToTotalPathLength",
         "referToWidthAndHeightOfElement",
         "referToWidthOfAffectedGlyph",

l10n/css.json

@@ -1509,7 +1509,7 @@
   "referToSVGViewportWidth": {
     "en-US": "refer to the width of the current SVG viewport"
   },
-  "referTtoTheUsedValueOfLineHeight": {
+  "referToTheUsedValueOfLineHeight": {
     "en-US": "refer to the used value of {{cssxref(\"line-height\")}}"
   },
   "referToTotalPathLength": {