Update 1-prepare-your-org.rst

Made some tweaks to use of capitals; added 'potential' wherever risks are mentioned;

Questions / Comments:
Line 10 - should we link aim to get a couple of case studies linked from here? One for the next iteration I think.
Line 20 - made some changes to the wording on security issues.
Update 1-prepare-your-org.rst
Merge branch 'joni-branch'

Conflicts:
	en/publishing-to-iati/how-to-publish/1-prepare-your-org.rst