gracedb-2.28.0

Changes:

• Add robot scitoken accounts from LDAP (!216 (merged))
• Add catalog_managers users based on pipeline upload permissions (!218 (merged))
• Show/hide option to make log post public based on user's permissions (!219 (merged))
• new robot cert for gwskynet (!225 (merged))
• Allow for request headers up to 16kb (!222 (merged))
• RRT table fix for cwb-bbh skymaps (!226 (merged))