fix: close config file again

src/config.zig

@@ -32,6 +32,7 @@ pub const Config = struct {
             std.log.warn("Failed to open config file ({e}). Skipping config!", .{err});
             return self;
         };
+        defer file.close();
 
         var parser = ini.parse(std.heap.c_allocator, file.reader());
         defer parser.deinit();