build(deps): bump prom/alertmanager from v0.28.0 to v0.28.1 in /generators/server/resources #38097

Job	Run time
build-matrix	15s
ng-default (n22.14.0/j23)	2m 28s
ng-default-additional-esbuild (n20/j17)	2m 20s
ng-mysql-es-noi18n-mapsid (n20/j17)	1m 42s
ng-mongodb-kafka-cucumber (n20/j21)	1m 35s
ng-h2mem-ws-nol2 (n22.14.0/j21)	1m 39s
ng-couchbase (n18/j17)	1m 42s
ng-gradle-couchbase-search (n22.14.0/j17)	1m 32s
ng-gradle-fr (n20/j23)	2m 44s
ng-gradle-mariadb-oauth2-infinispan (n20/j23)	1m 35s
ng-gradle-h2disk-ws-nocache (n20/j23)	1m 43s
ng-webflux-mongodb-esbuild (n18/j23)	1m 59s
ng-webflux-gradle-mongodb-oauth2-esbuild (n18/j23)	3m 40s
ng-webflux-psql-default (n20/j23)	2m 8s
ng-webflux-psql-additional (n20/j23)	2m 8s
ng-webflux-gradle-session-h2mem-es-esbuild (n18/j23)	1m 47s
ng-webflux-couchbase (n18/j23)	2m 1s
ms-ng-oauth2-mongodb-caffeine (n18/j17)	2m 10s
mf-ng-eureka-jwt-psql-ehcache (n22.14.0/j17)	2m 12s
ms-mf-ng-consul-oauth2-neo4j (n22.14.0/j17)	1m 53s
check-angular	1s
	39m 14s

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