update to Moodle minor update post - stop git from complaining about file permissions changes

Found a couple of issues while upgrading using the steps given in my previous post regarding Moodle minor update using git -

1. If we uninstall the h5pactivity built-in plugin before the upgrade, the upgrade does not proceed - it complains about corrupted plugin. So, basically, we can't uninstall the default plugins without causing issues with upgrades.
   
   
2. If we change the file permissions, we need to add a command
   git config core.filemode false
   to prevent git from complaining about overwriting local files, listing all the files, and aborting the git pull. Via this post.

So, the updated list of commands:

cd /var/www/theLMSgit

sudo -u www-data /usr/bin/php admin/cli/maintenance.php --enable

git config core.filemode false

git pull

sudo chown -R azureuser:www-data .

sudo chmod -R 775 .

sudo -u www-data /usr/bin/php admin/cli/upgrade.php

(type y when prompted)