Typo fix for config parameter

Signed-off-by: kharade <rohan.kharade@openairinterface.org>

docker/scripts/gnb_parameters.yaml

@@ -40,6 +40,10 @@
       env: "@MNC@"
     - key: mnc_length
       env: "@MNC_LENGTH@"
+    - key: sst
+      env: "@NSSAI_SST@"
+    - key: sd
+      env: "@NSSAI_SD@"
     - key: tracking_area_code
       env: "@TAC@"
     - key: enable_x2