slightly increase the target SNR for the nr_dlsim low SNR test to make the test more reliable

cmake_targets/autotests/test_case_list.xml

@@ -1134,7 +1134,7 @@
                   -n100 -s2 -U 2 1 3
                   -n10 -s20 -U 3 0 0 2 -gR -x1 -y4 -z4
                   -n10 -s20 -U 3 0 0 2 -gR -x2 -y4 -z4
-                  -n100 -e0 -t99 -S-1.4 -i</main_exec_args>
+                  -n100 -e0 -t99 -S-1.2 -i</main_exec_args>
       <tags>nr_dlsim.test1 nr_dlsim.test2 nr_dlsim.test3 nr_dlsim.test4 nr_dlsim.test5 nr_dlsim.test6 nr_dlsim.test7 nr_dlsim.test8 nr_dlsim.test9 nr_dlsim.test10 nr_dlsim.test11 nr_dlsim.test12 nr_dlsim.test13 nr_dlsim.test14 nr_dlsim.test15 nr_dlsim.test16 nr_dlsim.test17 nr_dlsim.test18 nr_dlsim.test19 nr_dlsim.test20 nr_dlsim.test21 nr_dlsim.test22 nr_dlsim.test23</tags>
       <search_expr_true>PDSCH test OK</search_expr_true>
       <search_expr_false>segmentation fault|assertion|exiting|fatal</search_expr_false>