chore: fix typos and update readme

[MSzalowski]

Description

I've been looking at recent changes and found some typos, so to constantly improve the codebase - here is the PR.

Fixes #trivial

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update
• Documentation update

How Has This Been Tested?

• Check README.md
• Check Todo.md

Screenshot(s)

Please attach some screenshot or a movie if provided changes affects UI.

Test Configuration:

• Firmware version:
• Hardware:
• Toolchain:
• SDK:

Checklist:

• Add correct label to your pull request
• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules

[MateuszRostkowski]

Looks good to me :D 🏆