Added a "s" at the end of "prevent" in 3.2.8 release note.

source/releasenotes/3.2.8.rst

@@ -6,7 +6,7 @@
 Changes
 -------
 
-This version fixes a rare issue that prevent "xbusctl ps" to properly work in
+This version fixes a rare issue that prevents "xbusctl ps" to properly work in
 some cases. If a "xbusctl ps" doesn't return enough processes and a "nats
 payload exceeded" message appears in xbusd logs, you are concerned by this
 issue.