man: fix typo

Follow-up for 778cfac5fba45b7ac828571704945b722b2fb718.
Addresses https://github.com/systemd/systemd/pull/37434#discussion_r2088882005.

diff --git a/man/systemd-validatefs@.service.xml b/man/systemd-validatefs@.service.xml
index 17f3da987d3d978e773b660a727cfb02e9b24da1..9597b2ce9dff662f705f78f246b34d2aafebbcc9 100644 (file)
--- a/man/systemd-validatefs@.service.xml
+++ b/man/systemd-validatefs@.service.xml
@@ -50,7 +50,7 @@
       mounted to a location not matching any of the listed paths the validation check will
       fail.</para></listitem>
 
-      <listitem><para><varname>user.validatefs.gpt_label</varname>: this extended attribute may contain a one
+      <listitem><para><varname>user.validatefs.gpt_label</varname>: this extended attribute may contain one
       or more free-form strings, separated by NUL bytes. If set, all backing partitions of the file system
       are checked against this list, and if any backing partition's label is not listed, the validation will
       fail. Note that there may be multiple backing partition in case of Verity setups, which combines a data