style(next): rename CSS variable

src/public/stylesheets/theme-next-dark.css

@@ -191,7 +191,7 @@
     --right-pane-item-hover-color: white;
 
     --scrollbar-thumb-color: #fdfdfd5c;
-    --scrollbar-thumb-color-hover: #ffffff7d;
+    --scrollbar-thumb-hover-color: #ffffff7d;
     --scrollbar-border-color: unset; /* Deprecated */
     --scrollbar-background-color: unset; /* Deprecated */
 

src/public/stylesheets/theme-next-light.css

@@ -190,7 +190,7 @@
     --right-pane-item-hover-color: inherit;
 
     --scrollbar-thumb-color: #0000005c;
-    --scrollbar-thumb-color-hover: #00000066;
+    --scrollbar-thumb-hover-color: #00000066;
     --scrollbar-border-color: unset; /* Deprecated */
     --scrollbar-background-color: unset; /* Deprecated */
 

src/public/stylesheets/theme-next/forms.css

@@ -707,7 +707,7 @@ input[type="range"] {
 
 ::-webkit-scrollbar-thumb:hover {
     --s-thumb-thickness: var(--scrollbar-thumb-hover-thickness);
-    --s-thumb-color: var(--scrollbar-thumb-color-hover);
+    --s-thumb-color: var(--scrollbar-thumb-hover-color);
 }
 
 /* Scrollbar's increment/decrement buttons (repurposed as a scrollbar start/end gap) */
@@ -724,7 +724,7 @@ input[type="range"] {
  * Firefox scrollbars
  *
  * Unsupported features: --scrollbar-thumb-thickness, --scrollbar-thumb-hover-thickness,
- *                       --scrollbar-start-end-gap, --scrollbar-thumb-color-hover.
+ *                       --scrollbar-start-end-gap, --scrollbar-thumb-hover-color.
  */
 
 :root {

src/public/stylesheets/theme-next/notes/text.css

@@ -44,7 +44,7 @@ html .note-detail-editable-text :not(figure, .include-note, hr):first-child {
 
 .ck-content pre code {
     --scrollbar-thumb-color: gray;
-    --scrollbar-thumb-color-hover: gray;
+    --scrollbar-thumb-hover-color: gray;
 }
 
 .ck-content pre code::-webkit-scrollbar-track,