Add explicit git pull step in README? #654

From the README > "Updating existing installation":

https://github.com/deepmind/alphafold/blob/569eb4fea3733b979cb0442750b875759dd5ecc0/README.md?plain=1#L190-L191

I may have misunderstood, but wouldn't it be helpful to explicitly add the instruction to git pull if fetching returns no errors/displays merge conflicts?