Use Laconic version of ping-pub (#930)

Reviewed-on: cerc-io/stack-orchestrator#930
Co-authored-by: David Boreham <david@bozemanpass.com>
Co-committed-by: David Boreham <david@bozemanpass.com>

stack_orchestrator/data/stacks/mainnet-laconic/stack.yml

@@ -10,7 +10,7 @@ repos:
   - git.vdb.to/cerc-io/registry-sdk
   - git.vdb.to/cerc-io/laconic-registry-cli
   - git.vdb.to/cerc-io/laconic-console
-  - github.com/ping-pub/explorer
+  - git.vdb.to/cerc-io/cosmos-explorer
 npms:
   - registry-sdk
   - laconic-registry-cli