Change footer on each Insight page to focus on CTAs

[adamj89]

Is your feature request related to a problem? Please describe.
Have a clearer set of CTAs at the footer of each SOGS page

Describe the solution you'd like
Change CTA to

Take Action

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3. Sign up to our weekly newsletter, full of insights and news from our community.

Describe alternatives you've considered
N/A replaces existing block

Additional context
We don't think the existing CTA really shouts out "take action"

[zanete]

@osamajandali to design and propose a layout for the CTAs

• leave the page footer as is
• keep the sign-up box as is (but not so prominent)
• These additional CTAs could be above the sign-up

But Holding off until more changes that have been agreed after the SOGS hack day between Adam and Russ

cc @russelltrow @adamj89