Fix articles cards to NOT render raw HTML

[kkartunov]

Articles cards render raw HTML/markdown in Thrive.

Examples:

• https://www.topcoder.com/thrive/articles/The%20Room%20Summary%20Window - but should be parsed html
• Index cards on track search pages like https://www.topcoder.com/thrive/tracks?track=Topcoder&tax=Help%20Articles

[sandhiyakavi]

Verified in Test Environment.Working as expected.

[sandhiyakavi]

Verified in Beta. Working as expected.