docs: added markdown syntax highlighting in code blocks

[suprunchuk]

Checklist (Please check before submitting)

• I reviewed the Contributing Guide.
• I signed and emailed the appropriate Contributor License Agreement to GSFC-SoftwareRelease@mail.nasa.gov and copied cfs-program@lists.nasa.gov.

Describe the contribution
A clear and concise description of what the contribution is.

• Highlighting for bash has been added to the console code blocks

Code contributions
The cFS repository is provided to bundle the cFS Framework. It is utilized for bundling submodules, continuous integration testing, and version management and does not contain any software. Code contributions should be directed to the appropriate submodule.

Contributor Info - All information REQUIRED for consideration of pull request
Full name and company/organization/center of all contributors ("Personal" if individual work)

• Note CLAs apply to only software contributions.