doc/cephfs: edit "Disabling Volumes Plugin"

Improve the English language in the section 'Disabling Volumes Plugin"
(which here becomes "Disabling the Volumes Plugin") in the
doc/cephfs/troubleshooting.rst file.

The change here is similar to a change introduced in
ceph#60448. That PR seems to be unable to
pass the "make check", and this PR is part of a test to see if breaking
the changes in that PR into several smaller changes results in mergeable
PRs.

Signed-off-by: Zac Dover <[email protected]>

Author: zdover23

doc/cephfs/troubleshooting.rst

@@ -412,10 +412,11 @@ its associated key. A less drastic but half-fix is to change the osd cap for
 your user to just ``caps osd = "allow rw"``  and delete ``tag cephfs
 data=....``
 
-Disabling Volumes Plugin
-========================
-In certain scenarios, volumes plugin might be needed to disabled to prevent compromise
-for rest of the Ceph cluster. For details see: :ref:`disabling-volumes-plugin`
+Disabling the Volumes Plugin
+============================
+In certain scenarios, the Volumes plugin may need to be disabled to prevent
+compromise for rest of the Ceph cluster. For details see:
+:ref:`disabling-volumes-plugin`
 
 Reporting Issues
 ================