updating Git guidance as Databricks interface has changed

[jen-machin]

Overview of changes

• Updated guidance and screenshots
• Tidied up line breaks and weird newline escapes
• Modified all instances of "git" to be "Git" as per technical style guide

Why are these changes being made?

Databricks interface has changed. Repos are now called Git Folders and should be created in a different location to before.

Issue ticket number/s and link

Issue #95

Checklist before requesting a review

• I have checked the contributing guidelines
• I have checked for and linked any relevant issues that this may resolve
• I have checked that these changes build locally
• I understand that if merged into main, these changes will be publicly available

[jen-machin]

Analysts Guide: updating Git in Databricks guidance due to interface changes