[v3] Fix the line-numbers style in syntax highlighting (#2929)

* Fix the line-numbers style in syntax highlighting

* Update .changeset/warm-cameras-vanish.md

---------

Co-authored-by: Dimitri POSTOLOV <en3m@ya.ru>

Author: 87xie

.changeset/warm-cameras-vanish.md

@@ -0,0 +1,7 @@
+---
+'nextra': patch
+'nextra-theme-docs': patch
+'nextra-theme-blog': patch
+---
+
+Fix the line highlighting background-color does not extend to the full width of the code block when a scrollbar appears with line numbers.

packages/nextra/styles/code-block.css

@@ -25,7 +25,7 @@ pre code:not([class*='twoslash-']) {
     &::before {
       counter-increment: line;
       content: counter(line);
-      @apply _float-left _pr-4 _text-right _min-w-[2.6rem] _text-gray-500;
+      @apply _inline-block _pr-4 _text-right _min-w-[2.6rem] _text-gray-500;
     }
   }