eclipse-mosquitto: Remove defunct keyservers from build.

library/eclipse-mosquitto

@@ -1,6 +1,6 @@
 Maintainers: Roger Light <[email protected]> (@ralight)
 GitRepo: https://github.com/eclipse/mosquitto.git
-GitCommit: 3cbe805e71ac41a2a20cc9b2ea6b3b619f49554a
+GitCommit: 8212bbe29b6fc0a49c30a15b22a36ff0ac7b9d32
 Architectures: amd64, arm32v6, arm64v8, i386, ppc64le, s390x
 
 Tags: 2.0.14, 2.0, 2, latest