Use first uppercase letter for all handlers

This will unify all the handlers to use first uppercase letter for
ansible-lint to stop complaining.

I went through all `notify:` occurrences and fixed them by running
```
set TEXT "text_to_replace"; set REPLACEMENT "replacement_text"; git grep
-rlz "$TEXT" . | xargs -0 sed -i "s/$TEXT/$REPLACEMENT/g"
```

Then I went through all the changes and removed the ones that wasn't
expected to be changed.

Fixes https://pagure.io/fedora-infrastructure/issue/12391

Signed-off-by: Michal Konecny <mkonecny@redhat.com>

roles/zabbix/zabbix_agent/handlers/main.yml

@@ -1,7 +1,7 @@
 ---
-- name: restart_zabbix_agent
+- name: Restart zabbix agent
   service: name=zabbix-agent state=restarted
 
-- name: reload custom selinux files
+- name: Reload custom selinux files
   ansible.builtin.shell: /usr/sbin/semodule -u "/etc/selinux/centos/centos-zabbix-agent.pp"
   when: ansible_selinux.mode == "enforcing"

roles/zabbix/zabbix_agent/tasks/main.yml

@@ -60,7 +60,7 @@
   ansible.builtin.template:
     src: zabbix_agentd.conf.j2
     dest: "{{ zabbix_agentd }}"
-  notify: restart_zabbix_agent
+  notify: Restart zabbix agent
   tags:
     - zabbix_agent
 
@@ -102,7 +102,7 @@
     dest: "{{ zabbix_agentd_dir }}/{{ item }}"
     owner: zabbix
     mode: "0666"
-  notify: restart_zabbix_agent
+  notify: Restart zabbix agent
   with_items:
     - interface-alias.conf
   tags: