Update README.md

Co-authored-by: Julian Brost <[email protected]>

Author: oxzi

README.md

@@ -2,7 +2,8 @@
 
 # Icinga DB - Docker image
 
-**NOTE: With the release of Icinga DB [v1.3.0](https://github.com/Icinga/icingadb/releases/tag/v1.3.0), everything container-related was moved in the main repository.**
+> [!NOTE]
+> With the release of Icinga DB [v1.3.0](https://github.com/Icinga/icingadb/releases/tag/v1.3.0), everything container-related was moved in the main repository.**
 
 This image integrates [Icinga DB] into your [Docker] environment.