regex fix to include root partition

tasks/capture_lv_device_details.yml

@@ -21,7 +21,12 @@
   ansible.builtin.set_fact:
     bigboot_lvm_mounts: "{{ bigboot_lvm_mounts | default([]) + [item['key']] }}"
   loop: "{{ bigboot_adjacent_lvm_devices | dict2items }}"
-  when: item['value'] | regex_search("[a-zA-Z]")
+  when: item['value'] | regex_search('^/[a-zA-Z]')
+
+- name: Debug bigboot_lvm_mounts
+  ansible.builtin.debug:
+    var: bigboot_lvm_mounts
+    verbosity: 1
 
 - name: Set adjacent LVM device name
   ansible.builtin.set_fact:
@@ -30,6 +35,7 @@
 - name: Debug bigboot_adjacent_lvm_device
   ansible.builtin.debug:
     var: bigboot_adjacent_lvm_device
+    verbosity: 1
 
 - name: Get logical volume mount information
   ansible.builtin.set_fact: