Update version numbers after tagging

documentation/RELEASE_NOTES.md

@@ -11,6 +11,15 @@ release.
 The PVA submodules each have their own individual sets of release notes which
 should also be read to understand what has changed since earlier releases.
 
+**This version of EPICS has not been released yet.**
+
+## Changes made on the 7.0 branch since 7.0.5
+
+<!-- Insert new items immediately below here ... -->
+
+
+-----
+
 ## EPICS Release 7.0.5
 
 ### Fix aai's Device Support Initialization