docs/interop/parallels.txt: Convert to rST

Convert parallels.txt to rST format.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-id: 20240801170131.3977807-4-peter.maydell@linaro.org
diff --git a/MAINTAINERS b/MAINTAINERS
index 04a1fd0..ae8bed8 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -3964,7 +3964,7 @@
 S: Supported
 F: block/parallels.c
 F: block/parallels-ext.c
-F: docs/interop/parallels.txt
+F: docs/interop/parallels.rst
 T: git https://src.openvz.org/scm/~den/qemu.git parallels
 
 qed