Update Suggested Git Command in Contribution Guidelines

[subhamkumarr]

Description:

The current contribution guidelines recommend using git add * to stage changes before committing. However, it's more conventional and safer to use git add . to stage changes in the current directory. The difference lies in the behavior of these commands, where git add * stages all changes in the current directory and its subdirectories, potentially including unintended files, while git add . stages changes only in the current directory without including untracked files.

Solution:

Update the contribution guidelines to recommend using git add . instead of git add * for staging changes before committing. This will ensure consistency and help contributors avoid accidentally staging files they didn't intend to include in their commits.

[joaniefromtheblock]

lgtm