fix: retrieve only last next release draft (#21)

* fix: retrieve only last `next` release draft

As noted in jenkins-infra/pipeline-library#379, if there are more than one `next` release drafts, this script fails as it returns a multiline string.

* fix: also correct jq expression for INTERESTING_CATEGORIES grep

run.sh

@@ -2,11 +2,11 @@
 set -euxo pipefail
 if [ $GITHUB_EVENT_NAME = check_run ]
 then
-    gh api /repos/$GITHUB_REPOSITORY/releases | jq -e -r '.[] | select(.draft == true and .name == "next") | .body' | egrep "$INTERESTING_CATEGORIES"
+    gh api /repos/$GITHUB_REPOSITORY/releases | jq -e -r '[ .[] | select(.draft == true and .name == "next")] | max_by(.id).body' | egrep "$INTERESTING_CATEGORIES"
 fi
 export MAVEN_OPTS=-Djansi.force=true
 mvn -B -V -s $GITHUB_ACTION_PATH/settings.xml -ntp -Dstyle.color=always -Dset.changelist -DaltDeploymentRepository=maven.jenkins-ci.org::default::https://repo.jenkins-ci.org/releases/ -Pquick-build -P\!consume-incrementals clean deploy
 version=$(mvn -B -ntp -Dset.changelist -Dexpression=project.version -q -DforceStdout help:evaluate)
 gh api -F ref=refs/tags/$version -F sha=$GITHUB_SHA /repos/$GITHUB_REPOSITORY/git/refs
-release=$(gh api /repos/$GITHUB_REPOSITORY/releases | jq -e -r '.[] | select(.draft == true and .name == "next") | .id')
+release=$(gh api /repos/$GITHUB_REPOSITORY/releases | jq -e -r '[ .[] | select(.draft == true and .name == "next").id] | max')
 gh api -X PATCH -F draft=false -F name=$version -F tag_name=$version /repos/$GITHUB_REPOSITORY/releases/$release