fix(yum.yml): change package state to 'present' for consistency and improve comment clarity

roles/common/tasks/yum.yml

@@ -2,9 +2,9 @@
 - name: (yum.yml) Install system updates for redhat (centos/fedora) systems
   ansible.builtin.dnf:
     name: "*"
-    state: latest
+    state: present
     update_cache: true
-    #cache_valid_time: 3600
+    # cache_valid_time: 3600
   when:
     - ansible_facts.os_family == "RedHat"
     - ansible_facts.distribution == "CentOS" or ansible_facts.distribution == "Fedora"
@@ -14,12 +14,12 @@
 - name: Install the EPEL Repository in CentOS 7
   ansible.builtin.dnf:
     name: epel-release
-    state: latest
+    state: present
   when:
     - ansible_facts.os_family == "RedHat"
     - ansible_facts.distribution == "CentOS"
 
-# Its more eficient to in
+# Its more efficient to install packages in one shot.
 - name: (yum.yml) Base install CentOS packages (CentOS 7)
   ansible.builtin.dnf:
     name: "{{ yum_base_install_centos_7 }}"