feat(doc): add bold isolated cores reminder in OAI configuration section

doc/ORAN_FHI7.2_Tutorial.md

@@ -595,6 +595,8 @@ sudo /usr/local/bin/dpdk-devbind.py --bind vfio-pci 31:06.1
 
 ## Configure OAI gNB
 
+**Beware in the following section to let in the range of isolated cores the parameters that should be (i.e. `L1s.L1_rx_thread_core`, `L1s.L1_tx_thread_core`, `RUs.ru_thread_core`, `fhi_72.io_core` and `fhi_72.worker_cores`)**
+
 Sample configuration files for OAI gNB, specific to the manufacturer of the radio unit, are available at:
 1. LITE-ON RU: [`gnb.sa.band78.273prb.fhi72.4x4-liteon.conf`](../targets/PROJECTS/GENERIC-NR-5GC/CONF/gnb.sa.band78.273prb.fhi72.4x4-liteon.conf) (band n78, 273 PRBs, 3.5GHz center freq, 4x4 antenna configuration with 9 bit I/Q samples (compressed) for PUSCH/PDSCH/PRACH, 2-layer DL MIMO, UL SISO)
 2. Benetel 650 RU: [`gnb.sa.band78.273prb.fhi72.4x2-benetel650.conf`](../targets/PROJECTS/GENERIC-NR-5GC/CONF/gnb.sa.band78.273prb.fhi72.4x2-benetel650.conf) (band n78, 273 PRBs, 3.5GHz center freq, 4x2 antenna configuration with 9 bit I/Q samples (compressed) for PUSCH/PDSCH/PRACH, 2-layer DL MIMO, UL SISO)