Correct typos and update URLs

[Benjamin-Loison]

No description provided.

[petefoth]

Thanks for these changes. I did proof-read the document changes I made for typos, but it is had (impossible?) to spot your own mistakes :)

Would you be willing to review future documentation changes that I make before I merge them? I don't like merging changes - even documentation-only changes - without review, but at the moment I there is no-one I can call on to review them.

I will merge this PR.

Thanks again

[Benjamin-Loison]

@petefoth

I have not used the Markdown editor MarkText for this commit (hence #499), but with its spell checker (on Linux Mint in my case) already raises some typos such as:

• buid
• intallation
• knowlegdeable

In addition to find out incorrect commas use:

grep -E " ,|,'" README.md

I just established (hence #499) the following command-line to check URL updates:

grep -Eo "(http|https)://[a-zA-Z0-9./?=_%:-]*" README.md | sort -u | xargs -i sh -c 'curl -s -I "{}" | grep -wq "301" && echo "{}" && curl -s -I "{}" | grep location | cut -d ':' -f2-'

currently outputting:

https://docs.docker.com/docker-for-mac/install/
 /desktop/install/mac-install/
https://docs.docker.com/docker-for-windows/install/
 /desktop/install/windows-install/
https://docs.docker.com/install/linux/docker-ce/centos/
 /engine/install/centos/
https://docs.docker.com/install/linux/docker-ce/debian/
 /engine/install/debian/
https://docs.docker.com/install/linux/docker-ce/fedora/
 /engine/install/fedora/
https://docs.docker.com/install/linux/docker-ce/ubuntu/
 /engine/install/ubuntu/
https://docs.docker.com/toolbox/overview/
 /desktop/
https://github.com/microg/android_packages_apps_GmsCore/wiki/Signature-Spoofing
 https://github.com/microg/GmsCore/wiki/Signature-Spoofing
https://source.android.com/setup/build/building
 /docs/setup/build/building

Anyway I'm fine with reviewing documentation changes, just assign me as a reviewer.

[petefoth]

In addition to find out incorrect commas use:

grep -E " ,|,'" README.md

It might be a good plan to integrate those into a check that gets run automatically whenever README.mdis checked in.

I have no idea how to do that, but I'll raise an issue and maybe I'll find out :)