chore(deps): update dependency github-markdown-css to v5

Author: renovate-bot

package-lock.json

@@ -97,7 +97,7 @@
     "eslint-plugin-standard": "4.1.0",
     "esm": "3.2.25",
     "fs-extra": "10.0.0",
-    "github-markdown-css": "4.0.0",
+    "github-markdown-css": "5.0.0",
     "glob": "7.2.0",
     "gzip-size": "6.0.0",
     "highcharts": "9.3.1",

package.json

@@ -348,6 +348,11 @@ export class GvCode extends InputElement(LitElement) {
           padding: 0;
         }
 
+        .input .CodeMirror-wrap pre.CodeMirror-line,
+        .input .CodeMirror-wrap pre.CodeMirror-line {
+          white-space: pre;
+        }
+
         .medium .input .CodeMirror {
           height: var(--input-medium--lh);
         }