release: add the "6.3" to the 6.3 release
The release was tagged "6.3.0" while the custom have been to omit the third ".0"
for initial release for the history of the project.
For consistency, we add the customary version of the tag to the 6.3 release.
--- a/.hgtags Mon Nov 14 20:21:53 2022 +0100
+++ b/.hgtags Tue Nov 15 10:28:39 2022 +0100
@@ -249,3 +249,4 @@
dbdee8ac3e3fcdda1fa55b90c0a235125b7f8e6f 6.2.3
a3356ab610fc50000cf0ba55c424a4d96da11db7 6.3rc0
04f1dba53c961dfdb875c8469adc96fa999cfbed 6.3.0
+04f1dba53c961dfdb875c8469adc96fa999cfbed 6.3