chore(ci): Add Lua 5.5 to test matrix

Author: alerque

.github/workflows/busted.yml

@@ -12,7 +12,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        luaVersion: [ "5.4", "5.3", "5.2", "5.1", "luajit", "luajit-openresty" ]
+        luaVersion: [ "5.5", "5.4", "5.3", "5.2", "5.1", "luajit", "luajit-openresty" ]
     runs-on: ubuntu-24.04
     steps:
       - name: Checkout