Fixed copy-paste mistake

app.py

@@ -158,7 +158,7 @@ def change_leaderboard_category(category):
         abbreviation2name = leaderboard_server.CATEGORY_TO_TASK_ABBREVIATION_TO_NAME[category]
         for abbr, name in abbreviation2name.items():
             abbr_escaped = xmlEscape(abbr, MARKDOWN_SPECIAL_CHARACTERS)
-            name_escaped = xmlEscape(abbr, MARKDOWN_SPECIAL_CHARACTERS)
+            name_escaped = xmlEscape(name, MARKDOWN_SPECIAL_CHARACTERS)
             task_abbreviation_legend_body.append(f"| {abbr_escaped} | {name_escaped} |")
         
         task_abbreviation_legend = (