Added escaping to description to prevent XSS

The description wasn’t properly escaped against XSS.

This vulnerability affects the following application versions:

• All in One SEO Pack 2.3.9.2
• All in One SEO Pack 2.3.10
• All in One SEO Pack 2.3.10.1
• All in One SEO Pack 2.3.10.2
• All in One SEO Pack 2.3.11
• All in One SEO Pack 2.3.11.1
• All in One SEO Pack 2.3.11.2
• All in One SEO Pack 2.3.11.3
• All in One SEO Pack 2.3.11.4
• All in One SEO Pack 2.3.12
• All in One SEO Pack 2.3.12.1
• All in One SEO Pack 2.3.12.2
• All in One SEO Pack 2.3.12.2.1
• All in One SEO Pack 2.3.12.3
• All in One SEO Pack 2.3.12.4
• All in One SEO Pack 2.3.12.5
• All in One SEO Pack 2.3.13
• All in One SEO Pack 2.3.13.1
• All in One SEO Pack 2.3.13.2
• All in One SEO Pack 2.3.14
• All in One SEO Pack 2.3.14.1
• All in One SEO Pack 2.3.14.2
• All in One SEO Pack 2.3.15
• All in One SEO Pack 2.3.15.1
• All in One SEO Pack 2.3.15.2
• All in One SEO Pack 2.3.15.3
• All in One SEO Pack 2.3.16
• All in One SEO Pack 2.4
• All in One SEO Pack 2.4.1
• All in One SEO Pack 2.4.1.1
• All in One SEO Pack 2.4.2
• All in One SEO Pack 2.4.2.1
• All in One SEO Pack 2.4.3
• All in One SEO Pack 2.4.3.1
• All in One SEO Pack 2.4.4
• All in One SEO Pack 2.4.4.1
• All in One SEO Pack 2.4.5
• All in One SEO Pack 2.4.5.1
• All in One SEO Pack 2.4.6
• All in One SEO Pack 2.4.6.1
• All in One SEO Pack 2.5
• All in One SEO Pack 2.6.1
• All in One SEO Pack 2.7.2
• All in One SEO Pack 2.7.3
• All in One SEO Pack 2.8
• All in One SEO Pack 2.9
• All in One SEO Pack 2.9.1
• All in One SEO Pack 2.9.1.1
• All in One SEO Pack 2.10
• All in One SEO Pack 2.10.1
• All in One SEO Pack 2.11
• All in One SEO Pack 2.12
• All in One SEO Pack 2.12.1
• All in One SEO Pack 3.0
• All in One SEO Pack 3.0.1
• All in One SEO Pack 3.0.2
• All in One SEO Pack 3.0.3
• All in One SEO Pack 3.0.4
• All in One SEO Pack 3.1
• All in One SEO Pack 3.1.1
• All in One SEO Pack 3.2
• All in One SEO Pack 3.2.1
• All in One SEO Pack 3.2.2
• All in One SEO Pack 3.2.3
• All in One SEO Pack 3.2.4
• All in One SEO Pack 3.2.5
• All in One SEO Pack 3.2.6
• All in One SEO Pack 3.2.7
• All in One SEO Pack 3.2.8
• All in One SEO Pack 3.2.9
• All in One SEO Pack 3.2.10
• All in One SEO Pack 3.3
• All in One SEO Pack 3.3.1
• All in One SEO Pack 3.3.1.1
• All in One SEO Pack 3.3.2
• All in One SEO Pack 3.3.3
• All in One SEO Pack 3.3.4
• All in One SEO Pack 3.3.5
• All in One SEO Pack 3.4.2
• All in One SEO Pack 3.4.3
• All in One SEO Pack 3.5.2
• All in One SEO Pack 3.6.1
• All in One SEO Pack 3.6.2
• All in One SEO Pack 3.7.0