6.3 Release Notes (#10662)

* Initial changes

* Update with 4th lvl H

* Table of contet change

* MD format test

* External voc info update

* Update 1:04

* First version for PR

* a few quick changes to the upgrade instruction #10646

* Update 6.3-release-notes.md

* keywordTermURI heading #10646

* removed reExportAll from the upgrade instruction; it's only needed if they
choose to perform the optional step of migrating some metadata fields; and it
is already mentioned in the instruction on how to do that. #10646

* simplified the jvm options part of the payara upgrade instruction #10646

* moved payara upgrade into the main upgrade instruction #10646

* typos #10646

* added the Solr upgrade instruction #10646

* cosmetic #10646

* cosmetic #10646

* Deleted the solr upgrade note. #10646

* Initial changes

* #10646 add note about file access request email update

* Add issue number test

* add featured collection link

* Test issue link

* Batch of issues #

* Bug fixes issues no

* #10646 add issue link

* normalize line endings #10646

* various improvments #10646

* reorder #10646

* add Contributor Guide to 6.3 release notes #10646

* incorporate #10637 into release note #10646

* Update 6.3-release-notes.md

* Make Hidden HTML fields one more element in the ext. vocab updates

* Removing snippets

* small tweaks to upgrade instructions #10646

* no need to mention #10637 and #10642 as they were pre-release #10646

* s/safe/supported/ and remove dupe #10646

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Co-authored-by: Leonid Andreev <[email protected]>
Co-authored-by: qqmyers <[email protected]>
Co-authored-by: Stephen Kraffmiller <[email protected]>
Co-authored-by: Philip Durbin <[email protected]>

Author: 5 people