update nangate45/mempool_group failing metrics:

| Metric                                        | Old      | New      | Type     |
| ------                                        | ---      | ---      | ----     |
| detailedroute__timing__setup__tns             |  -7880.0 |  -7980.0 | Failing  |
| detailedroute__timing__hold__tns              |   -0.606 |    -8.77 | Failing  |
| finish__timing__setup__tns                    | -10800.0 | -10600.0 | Tighten  |

Signed-off-by: Arthur Koucher <[email protected]>

Author: AcKoucher

flow/designs/nangate45/mempool_group/rules-base.json

@@ -174,23 +174,23 @@
         "compare": ">="
     },
     "detailedroute__timing__setup__tns": {
-        "value": -7880.0,
+        "value": -7980.0,
         "compare": ">="
     },
     "detailedroute__timing__hold__ws": {
         "value": -0.15,
         "compare": ">="
     },
     "detailedroute__timing__hold__tns": {
-        "value": -0.606,
+        "value": -8.77,
         "compare": ">="
     },
     "finish__timing__setup__ws": {
         "value": -2.35,
         "compare": ">="
     },
     "finish__timing__setup__tns": {
-        "value": -10800.0,
+        "value": -10600.0,
         "compare": ">="
     },
     "finish__timing__hold__ws": {