fix: Rename main.bicep for network module

Author: Prajwal-Microsoft

infra/modules/network.bicep

@@ -63,7 +63,7 @@ param vmSize string
 // - Document subnet usage and purpose in code comments.
 // - For AVM modules, ensure only one delegation per subnet and leave delegations empty if not required.
 
-module network 'network/main.bicep' = {
+module network 'network/network-resources.bicep' = {
   name: take('network-${resourcesName}-create', 64)
   params: {
     resourcesName: resourcesName