WIP: Fix minor typos in vulnerabilities specs

What does this MR do?

Fix a few typos in one of the spec files.

All credit goes to vscode-spell-checker.

Screenshots

Does this MR meet the acceptance criteria?

Conformity

• [-] Changelog entry
• [-] Documentation (if required)
• Code review guidelines
• [-] Merge request performance guidelines
• [-] Style guides
• [-] Database guides
• Separation of EE specific content