pack: add Simple Voice Chat 2.6.17 + bump to 0.11.0

Adds proximity voice chat to the modpack. Server uses UDP/24454 by default
(firewall rule added separately).

Modrinth lists both sides as "optional" -- players without it can still
join, just no voice. Tagged "both" in the lockfile so server + launcher
both install it.

pack/pack.lock.json

@@ -1,7 +1,7 @@
 {
   "$schema": "Brass-and-Sigil pack.lock.json - generated, do not edit by hand unless you know what you are doing",
   "name": "Brass and Sigil",
-  "version": "0.10.0",
+  "version": "0.11.0",
   "minecraft": "1.21.1",
   "loader": {
     "type": "neoforge",
@@ -371,6 +371,17 @@
       "sha1": "b560f646a124d5204b1fb7321fec373b9c346fa5",
       "size": 522970,
       "side": "client"
+    },
+    {
+      "source": "modrinth",
+      "slug": "simple-voice-chat",
+      "versionId": "6rT2RWh6",
+      "version": "neoforge-1.21.1-2.6.17",
+      "path": "mods/voicechat-neoforge-1.21.1-2.6.17.jar",
+      "url": "https://cdn.modrinth.com/data/9eGKb6K1/versions/6rT2RWh6/voicechat-neoforge-1.21.1-2.6.17.jar",
+      "sha1": "55fc0d529318620bd2ce7a635657014c5c98e189",
+      "size": 4902096,
+      "side": "both"
     }
   ],
   "defaultServer": {
@@ -379,4 +390,4 @@
   },
   "defaultShader": "ComplementaryReimagined_r5.7.1.zip",
   "panelUrl": "https://bns-admin.sijbers.uk"
-}
+}