fix versions

Author: zewenli98

.github/scripts/generate_binary_build_matrix.py

@@ -58,8 +58,8 @@
 
 
 CURRENT_NIGHTLY_VERSION = "2.7.0"
-CURRENT_CANDIDATE_VERSION = "2.5.1"
-CURRENT_STABLE_VERSION = "2.5.1"
+CURRENT_CANDIDATE_VERSION = "2.7.0"
+CURRENT_STABLE_VERSION = "2.6.0"
 CURRENT_VERSION = CURRENT_STABLE_VERSION
 
 # By default use Nightly for CUDA arches