Update `English` translation

Currently translated at 99.6% (540 of 542 strings)

Translation: Wiki-Bot/Discord
Translate-URL: https://weblate.frisk.space/projects/wiki-bot/discord/en/

i18n/en.json

@@ -409,6 +409,7 @@
         "none": "*none*",
         "official": "Official wiki:",
         "pages": "Total pages:",
+        "posts": "Discussions posts",
         "talk": "talk",
         "topic": "Topic:",
         "users": "Active users:",