Styles - fix typos

Author: samaaron

app/gui/qt/theme/dark/doc-styles.css

@@ -114,15 +114,15 @@ code .info {
 }
 
 h1 {
-  font-size: xx-x-large;
+  font-size: xx-large;
   font-weight: bold;
   padding: 2px;
   color: white;
   background-color: deeppink;
 }
 
 h2 {
-  font-size: x-x-large;
+  font-size: x-large;
   font-weight: bold;
   padding: 2px;
   color: white;

app/gui/qt/theme/high_contrast/doc-styles.css

@@ -104,15 +104,15 @@ code .info {
 }
 
 h1 {
-  font-size: xx-x-large;
+  font-size: xx-large;
   font-weight: bold;
   padding: 2px;
   color: white;
   background-color: #99004A;
 }
 
 h2 {
-  font-size: x-x-large;
+  font-size: x-large;
   font-weight: bold;
   padding: 2px;
   color: white;

app/gui/qt/theme/light/doc-styles.css

@@ -102,15 +102,15 @@ code .info {
 }
 
 h1 {
-  font-size: xx-x-large;
+  font-size: xx-large;
   font-weight: bold;
   padding: 2px;
   color: white;
   background-color: deeppink;
 }
 
 h2 {
-  font-size: x-x-large;
+  font-size: x-large;
   font-weight: bold;
   padding: 2px;
   color: white;