[stable21] Bump 3rdparty reference

LukasReschke · LukasReschke · commit 0375c156d23d · 2021-09-13T11:43:02.000+02:00
Includes nextcloud/3rdparty#784 Signed-off-by: Lukas Reschke <lukas@statuscode.ch>
diff --git a/3rdparty b/3rdparty
@@ -1 +1 @@
-Subproject commit 1a42635cd768a1fff54b12666cd16f2236f7acd5
+Subproject commit 813157ab1a7453ee7e7678036259e9ec2ffd083c
