Capitalize Or at the beginning of the sentence

Co-authored-by: Hugo van Kemenade <1324225+hugovk@users.noreply.github.com>

Author: ezio-melotti

getting-started/git-boot-camp.rst

@@ -460,7 +460,7 @@ If you don't have GitHub CLI or hub installed, you can run the following command
    $ git fetch upstream pull/NNNNN/head:pr_NNNNN
    $ git switch pr_NNNNN
 
-or set up a Git alias:
+Or set up a Git alias:
 
 .. tab:: Unix/macOS