update schedule to once a month

Signed-off-by: Damian Perera <15967502+damianperera@users.noreply.github.com>

Author: damianperera

README.md

@@ -70,7 +70,7 @@ For more use-cases visit the [OpenWrt Wiki](https://openwrt.org/reasons_to_use_o
   - PassKey: `changeThisPassKey`
 
 ## Release Schedule
-Automated builds have been scheduled for once a week. Urgent hotfixes will be manually triggered.
+Automated builds have been scheduled for once a month. Urgent hotfixes will be manually triggered.
 
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