set prerelease: true

.github/release-drafter-dev-6.2.x.yml

@@ -1,4 +1,5 @@
 _extends: growi:.github/release-drafter.yml
 
 # Filter previous releases to consider only those with the tags starts with 'v6.2'
+prerelease: true
 tag-prefix: v6.2

.github/release-drafter-master.yml

@@ -1,4 +1,5 @@
 _extends: growi:.github/release-drafter.yml
 
 # Filter previous releases to consider only those with the master branch
+prerelease: true
 filter-by-commitish: true

.github/release-drafter.yml

@@ -1,4 +1,3 @@
-# Filter previous releases to consider only those with the target matching commitish.
 categories:
   - title: 'BREAKING CHANGES'
     labels: