Vulnerability Checker 5.0.4

Fixed: Prevented a PHP fatal error (Uncaught ValueError: Missing format specifier at end of string) by correcting the problematic format string usage.

Fixed: Resolved PHP warnings (uncaught values and undefined array key) by using the ?? (null coalescing) operator.

Fixed: Added CSS to ensure table footers display correctly across the extension tables.

Updated: Standardized table classes for better UI consistency.

Updated: Updated the plugin Documentation URI header to point to the correct documentation.