style 💎: Improve krb5_conf_path extraction regex

Updated the regular expression to extract the absolute path of the krb5.conf file from the samba provision output, ensuring a more accurate and reliable value.

tasks/kerberos.yml

@@ -2,7 +2,7 @@
 - name: Extract absolute krb5.conf path from provision output
   ansible.builtin.set_fact:
     krb5_conf_path: >-
-      {{ (your_string_variable
+      {{ (samba_provision_output.stdout
           | regex_findall("(/\\S*krb5\\.conf)")
           | default([])
         ) | first | default('') }}