fix(ci): luarocks unknown "licence" field

GHA reports a warning:

    Unexpected input(s) 'licence', valid inputs are ['name', 'version', 'specrev', 'dependencies', 'test_dependencies', 'labels', 'copy_directories', 'summary', 'detailed_description', 'template', 'license', 'extra_luarocks_args', 'fail_on_duplicate']

.github/workflows/release.yml

@@ -18,4 +18,4 @@ jobs:
             This plugin allows for declaratively configuring,
             launching, and initializing language servers you have installed on your system.
             Language server configurations are community-maintained.
-          licence: "Apache/2.0"
+          license: "Apache/2.0"