Add release note for kubedb-2024.12.18 (#485)

Signed-off-by: pritamdas99 <pritam@appscode.com>
Signed-off-by: Tapajit Chandra Paul <tapajit@appscode.com>
Signed-off-by: obaydullahmhs <obaydullah@appscode.com>
Signed-off-by: souravbiswassanto <sourav.cse4.bu@gmail.com>
Signed-off-by: raihankhan <raihan@appscode.com>
Signed-off-by: Neaj Morshad <neaj@appscode.com>
Signed-off-by: Tamal Saha <tamal@appscode.com>
Co-authored-by: Tapajit Chandra Paul <tapajit@appscode.com>
Co-authored-by: obaydullahmhs <obaydullah@appscode.com>
Co-authored-by: souravbiswassanto <sourav.cse4.bu@gmail.com>
Co-authored-by: raihankhan <raihan@appscode.com>
Co-authored-by: Neaj Morshad <neaj@appscode.com>
Co-authored-by: Tamal Saha <tamal@appscode.com>