fix: Add pipefail option to shell command in verify.yml

Resolves ansible-lint risky-shell-pipe violation by adding
'set -o pipefail' to shell task that uses pipes.

molecule/bind9-20/verify.yml

@@ -105,6 +105,7 @@
 
     - name: Verify no critical errors in logs
       ansible.builtin.shell: |
+        set -o pipefail
         if grep -i "error" /var/log/named/default.log | grep -v "error reporting" > /dev/null; then
           exit 1
         fi