Update Prosody version to 0.12.4 + Lua5.4

[JohnXLivingston]

Currently the plugin is using Prosody 0.12.3+Lua5.2, based on Debian bullseye.
The Prosody Appimage for Prosody 0.12.4+Lua5.5 based on Debian Bookworm is ready: https://github.com/JohnXLivingston/prosody-appimage/releases/tag/v0.12.4-1

To change the Prosody version:

diff --git a/build-prosody.sh b/build-prosody.sh
index b121a2a4c..4a967d002 100644
--- a/build-prosody.sh
+++ b/build-prosody.sh
@@ -6,12 +6,12 @@ set -euo pipefail
 # This script download the Prosody AppImage from the https://github.com/JohnXLivingston/prosody-appimage project.
 
 repo_base_url='https://github.com/JohnXLivingston/prosody-appimage/releases/download'
-wanted_release='v0.12.3-1'
+wanted_release='v0.12.4-1'
 
 x86_64_filename='prosody-x86_64.AppImage'
-x86_64_sha256sum='f4af9bfefa2f804ad7e8b03a68f04194abb801f070ae620b3d4bcedb144e8523'
+x86_64_sha256sum='7d92bf2bfcb0bc6d7a3bf82b0c17e5280d34bcddbfea93510c44b69615140d42'
 aarch64_filename='prosody-aarch64.AppImage'
-aarch64_sha256sum='878c5be719e1e36a84d637fd2bd44e3059aa91ddb6906ad05f1dd0334078df09'
+aarch64_sha256sum='a48704e4da73fba560217ee483ec89ba5fc6741a1978647bb5c29fcb24d28ab6'
 
 download_dir="$(pwd)/vendor/prosody-appimage"
 dist_dir="$(pwd)/dist/server/prosody"

Warning: it seems that defaults Garbage Collection parameters for this version are not optimal (see tests 33-prosody-gc).

So, if we update the version, we should tweak those parameters.

Tweaking these parameters can be achieved doing this (for example):

diff --git a/server/lib/prosody/config/content.ts b/server/lib/prosody/config/content.ts
index b0660186c..5a25bf633 100644
--- a/server/lib/prosody/config/content.ts
+++ b/server/lib/prosody/config/content.ts
@@ -476,6 +476,15 @@ class ProsodyConfigContent {
     let content = ''
     content += this.global.write()
     content += this.log + '\n'
+
+    content += `
+gc = {
+  mode = "generational";
+  minor_threshold = 5;
+  major_threshold = 50;
+};
+    `
+
     content += '\n\n'
     if (this.authenticated) {
       content += this.authenticated.write()