xfs-documentation: bump design doc revisions

Document the new content.

Signed-off-by: "Darrick J. Wong" <djwong@kernel.org>
diff --git a/design/XFS_Filesystem_Structure/docinfo.xml b/design/XFS_Filesystem_Structure/docinfo.xml
index 3aadb66..8e34133 100644
--- a/design/XFS_Filesystem_Structure/docinfo.xml
+++ b/design/XFS_Filesystem_Structure/docinfo.xml
@@ -249,4 +249,20 @@
 			</simplelist>
 		</revdescription>
 	</revision>
+	<revision>
+		<revnumber>3.14159265358</revnumber>
+		<date>April 2025</date>
+		<author>
+			<firstname>Darrick</firstname>
+			<surname>Wong</surname>
+			<email>djwong@kernel.org</email>
+		</author>
+		<revdescription>
+			<simplelist>
+				<member>realtime rmap</member>
+				<member>realtime refcount</member>
+				<member>zoned device support</member>
+			</simplelist>
+		</revdescription>
+	</revision>
 </revhistory>