[doc] Add missing link to the 1.16.6 repo

Signed-off-by: Pierre-Charles David <[email protected]>

Author: pcdavid

README.md

@@ -46,6 +46,7 @@ Update Sites (p2 repositories) are available at:
 
 | Version | Repository URL                                                                       |
 |:--------|:-------------------------------------------------------------------------------------|
+| 1.16.6  | https://download.eclipse.org/modeling/gmp/gmf-runtime/updates/releases/R202501291447 |
 | 1.16.5  | https://download.eclipse.org/modeling/gmp/gmf-runtime/updates/releases/R202410240748 |
 | 1.16.4  | https://download.eclipse.org/modeling/gmp/gmf-runtime/updates/releases/R202405171447 |
 | 1.16.3  | https://download.eclipse.org/modeling/gmp/gmf-runtime/updates/releases/R202403010913 |