chore: edit init container security context for keycloak

Author: olevski

helm-chart/renku/values.yaml

@@ -338,9 +338,11 @@ keycloakx:
             - ALL
     - name: init-certificates
       securityContext:
+        runAsNonRoot: true
         allowPrivilegeEscalation: false
-        runAsGroup: 65534
-        runAsUser: 65534
+        capabilities:
+          drop:
+            - ALL
       image: "registry.access.redhat.com/ubi8/ubi:8.4"
       command: ["sh", "-c"]
       args: ["mkdir -p /etc/pki/ca-trust/extracted/openssl/ /etc/pki/ca-trust/extracted/pem/ /etc/pki/ca-trust/extracted/java/ /etc/pki/ca-trust/extracted/edk2 && update-ca-trust"]