ci: update devnet repo url (#875)

Author: DeepakBomjan

.github/deployer/init_script.sh

@@ -74,7 +74,7 @@ mkdir -p /opt/deployer/{bin,root}
 mkdir -p /opt/deployer/root/{keystore,keyutils}
 
 # Clone repo
-cd /opt/deployer/root/ && git clone https://github.com/icon-project/ibc-devops.git
+cd /opt/deployer/root/ && git clone https://github.com/icon-project/devnet.git ibc-devops
 cd ibc-devops
 git checkout $${DEPLOY_SCRIPT_BRANCH}
 cd ..