Add 5.6.3 release notes document

Author: marcphilipp

documentation/src/docs/asciidoc/release-notes/index.adoc

@@ -16,6 +16,8 @@ authors as well as build tool and IDE vendors.
 
 include::{includedir}/link-attributes.adoc[]
 
+include::{basedir}/release-notes-5.6.3.adoc[]
+
 include::{basedir}/release-notes-5.6.2.adoc[]
 
 include::{basedir}/release-notes-5.6.1.adoc[]

documentation/src/docs/asciidoc/release-notes/release-notes-5.6.3.adoc

@@ -0,0 +1,30 @@
+[[release-notes-5.6.3]]
+== 5.6.3
+
+*Date of Release:* October 26, 2020
+
+*Scope:* Bug fixes since 5.6.2
+
+For a complete list of all _closed_ issues and pull requests for this release, consult the
+link:{junit5-repo}+/milestone/53?closed=1+[5.6.3] milestone page in the JUnit repository
+on GitHub.
+
+
+[[release-notes-5.6.3-junit-platform]]
+=== JUnit Platform
+
+No changes.
+
+
+[[release-notes-5.6.3-junit-jupiter]]
+=== JUnit Jupiter
+
+No changes.
+
+
+[[release-notes-5.6.3-junit-vintage]]
+=== JUnit Vintage
+
+==== Bug Fixes
+
+* ❓