Update download link for the latest version of Open Cells SIM card programing tool uicc-v2.6

doc/NR_SA_CN5G_gNB_B210_COTS_UE_Tutorial.md

@@ -118,7 +118,7 @@ chmod 644 ~/oai-cn5g-fed/docker-compose/oai_db.sql
 ```
 
 ## 2.4 SIM Card
-Program SIM Card with [Open Cells Project](https://open-cells.com/) application [uicc-v2.5](https://open-cells.com/d5138782a8739209ec5760865b1e53b0/uicc-v2.5.tgz).
+Program SIM Card with [Open Cells Project](https://open-cells.com/) application [uicc-v2.6](https://open-cells.com/d5138782a8739209ec5760865b1e53b0/uicc-v2.6.tgz).
 
 ```bash
 sudo ./program_uicc --adm 12345678 --imsi 208990000000001 --isdn 00000001 --acc 0001 --key fec86ba6eb707ed08905757b1bb44b8f --opc C42449363BBAD02B66D16BC975D77CC1 -spn "OpenAirInterface" --authenticate

doc/NR_SA_CN5G_gNB_N300_COTS_UE_Tutorial.md

@@ -119,7 +119,7 @@ chmod 644 ~/oai-cn5g-fed/docker-compose/oai_db.sql
 ```
 
 ## 2.4  SIM Card
-Program SIM Card with [Open Cells Project](https://open-cells.com/) application [uicc-v2.5](https://open-cells.com/d5138782a8739209ec5760865b1e53b0/uicc-v2.5.tgz).
+Program SIM Card with [Open Cells Project](https://open-cells.com/) application [uicc-v2.6](https://open-cells.com/d5138782a8739209ec5760865b1e53b0/uicc-v2.6.tgz).
 
 ```bash
 sudo ./program_uicc --adm 12345678 --imsi 208990000000001 --isdn 00000001 --acc 0001 --key fec86ba6eb707ed08905757b1bb44b8f --opc C42449363BBAD02B66D16BC975D77CC1 -spn "OpenAirInterface" --authenticate