chore: update working directory for docker image build in iota-private-network setup action

Author: itsyaasir

.github/actions/iota-private-network/setup/action.yml

@@ -18,8 +18,8 @@ runs:
 
     - name: build docker images
       shell: bash
+      working-directory: iota/docker/iota-private-network
       run: |
-        cd docker/iota-private-network
         ../iota-node/build.sh -t iota-node --no-cache
         ../iota-indexer/build.sh -t iota-indexer --no-cache
         ../iota-tools/build.sh -t iota-tools --no-cache