Fix some changelog formatting and add link to XXE fix (#1794)
Fix some changelog formatting and add link to XXE fix (#1794)

* fix: Correct markdown formatting for heading

* docs: Reformat changelog and add link to XXE fix commit
pgjdbc/pgjdbc,pgjdbc/pgjdbc,davecramer/pgjdbc,jorsol/pgjdbc,sehrope/pgjdbc,jorsol/pgjdbc,sehrope/pgjdbc,davecramer/pgjdbc,jorsol/pgjdbc,pgjdbc/pgjdbc,marschall/pgjdbc,marschall/pgjdbc,sehrope/pgjdbc,marschall/pgjdbc,pgjdbc/pgjdbc,davecramer/pgjdbc,davecramer/pgjdbc,sehrope/pgjdbc,jorsol/pgjdbc,marschall/pgjdbc