Update "Exploring the universe" demo screenshot

[mikehoffms]

• In /exploring-the-universe/images/local-metrics-results.png:
  • Make the window narrower, and make the demo page pane narrower, while still producing non-green metrics.
  • Show the About this demo link.
  • Change the heading from Precession of the Equinoxes (162-127 BC) to Precession of the Equinoxes (130 BC).
    • Show the Precession of the Equinoxes (130 BC) heading.
  • Change the heading from Laws of Planetary Motion (1609-1619) to Laws of Planetary Motion (1619).
  • Put the red box only around the heading Heliocentric Theory (1543) within the expanded div.
• In the demo's Readme:
  • Say to maximize window.
  • Change from:
    click one of the headings in the right-hand Discoveries column, such as Laws of Planetary Motion (1609-1619).
    to:
    click one of the headings in the right-hand Discoveries column, such as Heliocentric Theory (1543).

https://github.com/MicrosoftEdge/Demos/raw/main/exploring-the-universe/images/local-metrics-results.png

https://github.com/MicrosoftEdge/Demos/tree/main/exploring-the-universe

https://microsoftedge.github.io/Demos/exploring-the-universe/