refactor (Numbers): README update

Author: JPPortier

snippets/src/main/java/numbers/README.md

@@ -1,5 +1,6 @@
 # Numbers snippets
-Sinch Java SDK Code Snippets Repository 
+Sinch Java SDK Code Snippets Repository for Numbers APIs
+
 See main [README.md](../../../../../README.md) for how to execute snippets
 
 - Numbers
@@ -11,14 +12,14 @@ See main [README.md](../../../../../README.md) for how to execute snippets
   - [numbers/Update](Update.java)
   - [numbers/Get](Get.java)
   - [numbers/Release](Release.java)
-  - Emergency Addresses
-    - [numbers/ValidateEmergencyAddress](ValidateEmergencyAddress.java)
-    - [numbers/ProvisionEmergencyAddress](ProvisionEmergencyAddress.java)
-    - [numbers/GetEmergencyAddress](GetEmergencyAddress.java)
-    - [numbers/DeprovisionEmergencyAddress](DeprovisionEmergencyAddress.java)
-  - Regions
-    - [numbers/regions/List](List.java) 
-  - Callbacks
-     - [numbers/callback/Get](Get.java)
-     - [numbers/callback/Update](Update.java)
+- Emergency Addresses
+  - [numbers/ValidateEmergencyAddress](ValidateEmergencyAddress.java)
+  - [numbers/ProvisionEmergencyAddress](ProvisionEmergencyAddress.java)
+  - [numbers/GetEmergencyAddress](GetEmergencyAddress.java)
+  - [numbers/DeprovisionEmergencyAddress](DeprovisionEmergencyAddress.java)
+- Regions
+  - [numbers/regions/List](List.java) 
+- Callbacks
+   - [numbers/callback/Get](Get.java)
+   - [numbers/callback/Update](Update.java)