Add notes around sample SA gNB and nrUE commands in most basic tutorials...

Add notes around sample SA gNB and nrUE commands in most basic tutorials 'NR_SA_Tutorial_COTS_UE.md' and 'NR_SA_Tutorial_OAI_nrUE.md'.
The notes mention that for versions previous to 2024.w45, the --sa argument should be added to run in SA mode.

doc/NR_SA_Tutorial_COTS_UE.md

@@ -103,6 +103,10 @@ docker compose up -d
 
 ## 4.2 Run OAI gNB
 
+**Note:** From tag `2024.w45`, OAI gNB runs by default in standalone (SA) mode.  
+In earlier versions the default mode was non-standalone (NSA).  
+If you are using an earlier version than `2024.w45`, you should add the `--sa` argument to the sample commands below to obtain a correct behavior.
+
 ### USRP B210
 ```bash
 cd ~/openairinterface5g/cmake_targets/ran_build/build

doc/NR_SA_Tutorial_OAI_nrUE.md

@@ -94,6 +94,10 @@ docker compose up -d
 
 ## 4.2 Run OAI gNB
 
+**Note:** From tag `2024.w45`, OAI gNB runs by default in standalone (SA) mode.  
+In earlier versions the default mode was non-standalone (NSA).  
+If you are using an earlier version than `2024.w45`, you should add the `--sa` argument to the sample commands below to obtain a correct behavior.
+
 ### USRP B210
 ```bash
 cd ~/openairinterface5g/cmake_targets/ran_build/build
@@ -126,6 +130,11 @@ sudo ./nr-softmodem -O ../../../targets/PROJECTS/GENERIC-NR-5GC/CONF/gnb.sa.band
 # 5. OAI UE
 
 ## 5.1 Run OAI nrUE
+
+**Note:** From tag `2024.w45`, OAI nrUE runs by default in standalone (SA) mode.  
+In earlier versions the default mode was non-standalone (NSA).  
+If you are using an earlier version than `2024.w45`, you should add the `--sa` argument to the sample commands below to obtain a correct behavior.
+
 ### USRP B210
 Important notes:
 - This should be run in a second Ubuntu 22.04 host, other than gNB
@@ -194,6 +203,10 @@ The CL option `--uicc0.imsi`  can override the IMSI value in the configuration f
 
 More details available at [ci-scripts/yaml_files/5g_rfsimulator/README.md](../ci-scripts/yaml_files/5g_rfsimulator/README.md).
 
+**Note:** From tag `2024.w45`, OAI nrUE runs by default in standalone (SA) mode.  
+In earlier versions the default mode was non-standalone (NSA).  
+If you are using an earlier version than `2024.w45`, you should add the `--sa` argument to the sample commands above to obtain a correct behavior.
+
 ## 5.2 End-to-end connectivity test
 - Ping test from the UE host to the CN5G
 ```bash