Merge branch 'typo_template' into 'develop'

DOC: fix documentation_changes template

See merge request orfeotoolbox/otb!578

.gitlab/issue_templates/documentation_changes.md

-### Target documentation ressources
+### Target documentation resources
 
-Can be a combination of Software guide, cookbook, doxygen, blog, applications doc, websites
+Can be a combination of CookBook, doxygen, blog, applications doc, websites
 
 ### Change requested