Follow-up changes for Speakers page

[bhavin192]

#194

• Some of the speaker taglines are going beyond the box, maybe those can be confined and wrap if those go beyond the box.
• Clicking on the speaker tile can take user to the Pretalx page of the speaker. Example: https://cfp.in.pycon.org/2025/speaker/3HJ3PX/
• Like our other pages we could add a few lines about the page (generally we have that blue section at top with a paragraph, can discuss with Shabnam on how does it look and then decide).