Update pfcp-agent

To the same version tested with up4 contained in sdfabric-onos image:

    docker image inspect opennetworking/sdfabric-onos:master-2022-02-07 | grep org.omecproject.up4.version
        "org.omecproject.up4.version": "59857a4b0cbe7f2e0a71128929860db5a082bc0b",

    https://github.com/omec-project/up4/blob/59857a4b0cbe7f2e0a71128929860db5a082bc0b/.env.stable#L5

Change-Id: If311ede57e675654a0a66fdc98683ccd92910d0c
diff --git a/pfcp-agent/Chart.yaml b/pfcp-agent/Chart.yaml
index acfc4a9..f6d8147 100644
--- a/pfcp-agent/Chart.yaml
+++ b/pfcp-agent/Chart.yaml
@@ -5,4 +5,4 @@
 apiVersion: v1
 description: PFCP Agent for SD-Fabric's P4 UPF
 name: pfcp-agent
-version: 0.0.5
+version: 0.0.6