install_scoop.cmd: Improve grammar

[RavenMacDaddy]

On a more serious note, and regarding previous discussions, some things to keep in mind:

• We want to keep the sentences as effective (i.e., short and clear) and at the same time as grammatically correct as possible – specifically because we're dealing with something being presented in a CLI environment.
• Why do we want to capitalize the first letter of Scoop? There are two things that are important to separate:

1. Scoop as a product name.

Notice how every instance is capitalized, as expected.

2. Working with Scoop, which is primarily through a CLI;

During operation, the typography is based on operating within a CLI environment, which in this case means only using lower case lettering.

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So, we want to make the sentence more effective, and we want to describe Scoop in the form of a product name.

Therefore, regarding the last part, we want to capitalize the first letter in this instance.

[Martí Climent (marticliment)]

Hi RavenMacDaddy, thanks for doing that. I have tons of stuff to do, and it is true that sometimes i leave behind some stuff like grammar or more case-specific features.

Real thanks for fixing this little stuff that i hadn't even realised ;)