fix: handler name

Author: angristan

handlers/main.yml

@@ -1,5 +1,5 @@
 ---
-- name: Restart postgres_exporter
+- name: Restart postgres-exporter
   ansible.builtin.systemd:
     daemon_reload: true
     name: postgres-exporter

tasks/install.yml

@@ -26,5 +26,5 @@
     mode: 0750
     owner: postgres
     group: postgres
-  notify: Restart postgres_exporter
+  notify: Restart postgres-exporter
   when: not ansible_check_mode