expose connection strings - update release notes (#546)

update release notes:
* expose connection strings 
* support connection strings using SRV

Author: ciprian-tibulca

docs/RELEASE_NOTES.md

@@ -7,6 +7,8 @@
 
 - Changes
   - fixed an issue where the operator would reconcile based on events emitted by itself in certain situations.
+  - support connection strings using SRV.
+  - expose connection strings (including auth/tls values) for deployments as secrets for easy of use. Secrets name template: _\<MongoDB resource name\>-\<db\>-\<user\>_
 
 ## MongoDB Agent ReadinessProbe