v5.15.6 and v5.15.7

🛠🔥 Hotfix

• refactor: pinning dependency to prevent JS error #1390 (@mfranzke)
• refactor: updated dependency prismjs #1392 (@mfranzke)
• docs: Update the discord invitation link #1391 (@JosefBredereck)

Authors: 2

• Josef Bredreck (@JosefBredereck)
• Maximilian Franzke (@mfranzke)