Fix overly broad GrowthStack .container CSS rule

Hi, could you fix this CSS rule from the plugin?

.container {
  overflow: hidden;
  padding-top: 56.25%;
  position: relative;
  width: 100%;
}

The selector is too broad and is causing layout issues in the block editor. It should be scoped to the specific GrowthStack component instead of targeting the generic .container class globally.

For example, something like:

.growthstack-video-container {
  overflow: hidden;
  padding-top: 56.25%;
  position: relative;
  width: 100%;
}

or nested under a GrowthStack-specific wrapper would be much safer.