fix(styles): replace brackets

scenarios/xslt/edxml2html/css/styles.css

@@ -327,11 +327,11 @@ corr::after { content: ">"; } */
 }
 
 .tei.damage[data-degree=medium]::before {
-    content: "⌈";
+    content: "[";
 }
 
 .tei.damage[data-degree=medium]::after {
-    content: "⌉";
+    content: "]";
 }
 
 .tei.del::before { content: "[["; }