CNV-38977: missing single quotes in YAML

Author: ousleyp

modules/virt-disable-auto-updates-single-boot-source.adoc

@@ -31,7 +31,7 @@ System-defined boot source::
 ====
 Automatic updates are enabled by default for system-defined boot sources, but these boot sources are not listed in the CR unless you add them.
 ====
-.. Set the value of the `dataimportcrontemplate.kubevirt.io/enable` annotation to `false`.
+.. Set the value of the `dataimportcrontemplate.kubevirt.io/enable` annotation to `'false'`.
 +
 --
 For example:
@@ -45,7 +45,7 @@ spec:
   dataImportCronTemplates:
   - metadata:
       annotations:
-        dataimportcrontemplate.kubevirt.io/enable: false
+        dataimportcrontemplate.kubevirt.io/enable: 'false'
       name: rhel8-image-cron
 # ...
 ----