Update ReleaseNotes.md for 4.2-1

bca5a919 · Miguel Barros · b7ac0757 · bca5a919
Commit bca5a919 authored Sep 01, 2021 by Miguel Barros
--- a/ReleaseNotes.md
+++ b/ReleaseNotes.md
@@ -3,8 +3,13 @@
 ## Summary

 ### Features
- cta/CTA#1001 Maximum file size is now defined by VO instead of globally.

+# v4.2-1
+
+## Summary
+
+### Features
+- cta/CTA#1001 Maximum file size is now defined by VO instead of globally.
 - cta/CTA#1019 New command `cta-readtp` allows reading files from tape and verifying their checksum

 # v4.1-1