docs(table): Updates images for v6.

[bekah-stephens]

Closes #4569

[bekah-stephens]

@edonehoo @andrew-ronaldson I left the spacers off of the screenshots in the Spacing section since they didn't quite line up. let me know if we need to add them back in.

[patternfly-build]

Preview: https://patternfly-org-pr-4676-site.surge.sh

[edonehoo]

having spacers in the compact/default spacing images could be helpful to more clearly highlight the style differences between the two, but I can also kind of already notice the differences without them, so I'll leave that up to y'all

[bekah-stephens]

having spacers in the compact/default spacing images could be helpful to more clearly highlight the style differences between the two, but I can also kind of already notice the differences without them, so I'll leave that up to y'all

I have them hidden in Figma and chose not to show them because I couldn't get the spacers to line up with the components. Happy to show them, I just need to figure out which tokens they're supposed to be using.