Remove recommendation for git fetch && git merge over git pull

[DeinAlptraum]

• I provide my work under the project license.
• I grant such license of my work as is required for the purposes of future print editions to Ben Straub and Scott Chacon.

Changes

Remove the recommendation for git fetch && git merge over git pull

Context

Fixes #2020

[LTBD-Admin]

Using git fetch followed by git merge gives developers more control over the merging process. It allows them to review changes before merging, which can help avoid unexpected conflicts.