Bump to latest release.

component/open62541/buildout.cfg

@@ -18,9 +18,9 @@ max_version = 11
 [open62541]
 recipe = slapos.recipe.cmmi
 shared = true
-tag = v1.3.4
-url = https://github.com/open62541/open62541/archive/refs/heads/pack/${:tag}.zip
-md5sum = b9c1d3ae9d7593941108f46036f29ccc
+tag = v1.3.15
+url = https://github.com/open62541/open62541/archive/refs/tags/${:tag}.zip
+md5sum = b459e2369e3550dd47e53cdbc62ec8a5
 patch-options = -p1
 patches =
   ${:_profile_base_location_}/ipv6_bugfix.patch#355bec02adee4ea73ff5a56ba6971ad2