Slicing tutorial fix

@arora @tien-thinh.nguyen Can we agree to updated slice information for the slicing tutorial ->

* Slice1: [SST=128,SD=2] =>   NRF1, SMF1, UPF1, GNB1, UE1
* Slice2: [SST=1]        =>   NRF1, SMF2, UPF2, GNB2, UE2
* Slice3: [SST=130,SD=4] =>   NRF2, SMF3, VPP-UPF3, GNB3, UE3

docs/DEPLOY_SA5G_SLICING.md

@@ -197,19 +197,38 @@ $ docker image tag rdefosseoai/oai-nr-ue:develop oai-nr-ue:develop
 ## 7. Executing `ransim` Scenario
 
 We deploy ran simulators with the help of docker-compose as below -
-
+Deploy ran simulator for slice 1
 ``` shell
-docker-compose-host $: docker-compose -f docker-compose-slicing-ransim.yaml up -d
-Creating gnbsim             ... done
-Creating ueransim           ... done
+docker-compose-host $: docker-compose -f docker-compose-slicing-ransim.yaml up -d ueransim
+Creating ueransim             ... done
+```
+Wait a bit 
+``` shell
+docker-compose-host $: sleep 10
+```
+Deploy ran simulator for slice 2
+``` shell
+docker-compose-host $: docker-compose -f docker-compose-slicing-ransim.yaml up -d oai-gnb oai-nr-ue1
 Creating rfsim5g-oai-gnb    ... done
 Creating rfsim5g-oai-nr-ue1 ... done
 ```
-Wait a bit 
+Wait a bit
+``` shell
+docker-compose-host $: sleep 10
+```
+Deploy ran simulator for slice 3
+
+``` shell
+docker-compose-host $: docker-compose -f docker-compose-slicing-ransim.yaml up -d gnbsim
+Creating gnbsim             ... done
+```
+Wait a bit
 ``` shell
 docker-compose-host $: sleep 60
 ```
 
+
+
 ``` shell
 docker-compose-host $: docker-compose -f docker-compose-slicing-ransim.yaml ps -a
        Name                     Command                  State       Ports