[ROCm] update nightly binary build matrix to 7.0 7.1 (#7430)

ROCm 7.1 released 10/30. pytorch images are built.
pytorch/pytorch#166730 is merged.

Author: jeffdaily

tools/scripts/generate_binary_build_matrix.py

@@ -33,7 +33,7 @@
 }
 
 ROCM_ARCHES_DICT = {
-    "nightly": ["6.4", "7.0"],
+    "nightly": ["7.0", "7.1"],
     "test": ["6.3", "6.4"],
     "release": ["6.3", "6.4"],
 }