docs: update release cadence to one month

Author: krzema12

MAINTENANCE.md

@@ -2,7 +2,7 @@ This file describes various maintenance tasks, relevant for project maintainers
 
 # Release a new version
 
-It currently happens every two weeks, around Friday. We don't need to stick to this cadence strictly, the goal is to publish small frequent updates.
+It currently happens monthly, around the beginning of each month. We don't need to stick to this cadence strictly, the goal is to publish small frequent updates.
 
 1. Remove `-SNAPSHOT` for version starting from [/github-workflows-kt/build.gradle.kts](https://github.com/typesafegithub/github-workflows-kt/blob/main/github-workflows-kt/build.gradle.kts). By building the whole project with `./gradlew build`, you will learn what other places need to be adjusted. Once done, create a commit using this pattern for commit message: `chore: prepare for releasing version <version>`.
 1. Once CI is green for the newly merged commits, create and push an annotated tag: