Schema Pro 2.8.1

# Fix: Addressed a Broken Access Control security bug. Props to Patchstack for privately reporting it to our team.
# Fix: Issue with the custom image setting for How To Block.

# New: Rollback to previous versions feature.
# Improvement: Addressed nonces verification more effectively.
# Improvement: Allowed HTML format for the Description field in Job Posting Schema as per Google's guidelines.
# Improvement: Updated Interaction Count field markup in the Video Object schema as per Google guidelines.
# Fix: Invalid value error for Rating and Review Count fields when set to none in Local Business schema.

# Improvement: Updated markup for educationRequirements and experienceRequirements fields in Job Posting schema.
# Fix: Resolved PHP warning for Site Logo.
# Fix: Custom Fields used in schema not showing correct value.