fix: correct jq expression to retrieve last next release draft

Follow-up of #380 

The previous one was retrieving the last release #, not always in draft nor titled "next"

vars/buildDockerAndPublishImage.groovy

@@ -196,7 +196,7 @@ def call(String imageName, Map userConfig=[:]) {
               fi
               '''
 
-              final String release = sh(returnStdout: true, script: 'gh api ${GH_RELEASES_API_URI} | jq -e -r \'. | max_by(.id) | select(.draft == true and .name == "next").id\'').trim()
+              final String release = sh(returnStdout: true, script: 'gh api ${GH_RELEASES_API_URI} | jq -e -r \'[ .[] | select(.draft == true and .name == "next").id] | max\'').trim()
               withEnv(["GH_NEXT_RELEASE_URI=${ghReleasesApiUri}/${release}"]) {
                 sh 'gh api -X PATCH -F draft=false -F name="${TAG_NAME}" -F tag_name="${TAG_NAME}" "${GH_NEXT_RELEASE_URI}"'
               } // withEnv