Update githubs-plans.md

The point `500 MB GitHub Packages storage` is redundant.
It is already includes under the title GitHub Free for personal accounts. So when you include it under GitHub Free for organizations by saying that `In addition to the features available with GitHub Free for personal accounts, GitHub Free for organizations includes:`, it becomes redundant

Author: saurabhb-dev

content/get-started/learning-about-github/githubs-plans.md

@@ -76,7 +76,6 @@ In addition to the features available with {% data variables.product.prodname_fr
 * Team discussions{% endif %}
 * Team access controls for managing groups
 * 2,000 {% data variables.product.prodname_actions %} minutes per month
-* 500 MB {% data variables.product.prodname_registry %} storage
 
 ## {% data variables.product.prodname_team %}