change fluid_ops coverage_check label (PaddlePaddle#77553)

Author: co63oc

tools/get_pr_title.py

@@ -24,7 +24,7 @@
     "cinn",
     "typing",
     "codestyle",
-    "fluid_ops",
+    "phi_ops",
     r"3.1\d",  # SOT Python 3.13 support
 ]