fix ansible-lint errors

roles/mkfs/molecule/default/verify.yml

@@ -7,19 +7,19 @@
   tasks:
     - name: "Attach the file to a loop device"
       ansible.builtin.command: losetup /dev/loop3 /tmp/test_file
-      register: loop_device
-      changed_when: loop_device.rc != 0
+      register: mkfs_loop_device
+      changed_when: mkfs_loop_device.rc != 0
 
     - name: "Verify the filesystem type"
       ansible.builtin.command: blkid /dev/loop3
-      register: blkid_output
-      changed_when: blkid_output.rc != 0
+      register: mkfs_blkid_output
+      changed_when: mkfs_blkid_output.rc != 0
 
     - name: "Ensure filesystem is ext3"
       ansible.builtin.assert:
         that:
-          - "'TYPE=\"ext3\"' in blkid_output.stdout"
+          - "'TYPE=\"ext3\"' in mkfs_blkid_output.stdout"
 
     - name: "Explore stdout"
       ansible.builtin.debug:
-        var: blkid_output.stdout
+        var: mkfs_blkid_output.stdout