Update knoldus wiki for git best practices

[girishchbharti]

As budlead team, we want to update knoldus wiki for git best practices

AC:

• Knoldus wiki should be updated for the latest changes on knoldus-buds for git best practices

[girishchbharti]

Git best practices: https://sites.google.com/a/knoldus.com/wiki/development/git---best-practices Git branching strategy: https://sites.google.com/a/knoldus.com/wiki/development/git---best-practices/branching-strategy