README Typo, Capitalization Changes

[carywreams]

Found this while looking to contribute for another Documentation item.
Did not find an open issue for any of these items in the README file.

git log entry:

    Typo: "the the" to "the" in installation instructions
    Changes Capitalization of Book and Chapter names:
        Data Visualisation chapter ref (anchor only)
        Graphics for communication (anchor only, matches actual)
        R for Data Science book name (anchor and text usage)

Notes

Looked at a couple of other README.Rmd PRs.

Did not see changes to README.md in the PR, so making assumption that's somehow automated and out-of-scope for a README PR.

If needed here, will need instructions of generating an updated README.md from the .Rmd file.

[clauswilke]

To update README.md, please open README.Rmd in RStudio and click on the "knit" button. Then ament your PR so it contains both the updated README.Rmd and the updated README.md. Thanks!

[carywreams]

Ah.
Don't suppose there's a command line option for this ?
If not, will take me a bit to get RStudio up and running to submit the PR for the README.

[carywreams]

ok.

Managed to get that to work via RStudio, but there was a side effect: A png file was re-created (git diff says these files are different).

I suspect this was expected, so I left it in the commit.

[clauswilke]

The new png is much smaller than the old one. @yutannihilation Any idea why by any chance? Did the default format change?

[clauswilke]

One more request, while you're at it: Could you change the URLs to https where they exist (probably all of them)?

[yutannihilation]

Not sure what causes the change (Pandoc 2 become smarter to resize the image to the necessary size?), but it seems reproducible. So, I think it's OK to merge.

Confession: I cheated on #3632 by editing README.md by hand, sorry... 🙄

[carywreams]

okay - updated those specs to be https.

while testing the links, noticed many were converting to https at the site anyway (they were all updated in the README, regardless).

the png file did not re-gen upon this knitting.

[clauswilke]

Thanks!