[ci skip] [copilot] fix comment, Eigen >=3.5.0

Author: EricaCMitchell

src/TiledArray/tensor/tensor.h

@@ -186,7 +186,7 @@ class Tensor {
     size_t size = range_.volume() * nbatch;
     allocator_type allocator;
 #if EIGEN_HAS_MAJOR_VERSION_5
-    // Eigen 3.5.x returns nullptr if size=0
+    // Eigen >=3.5.0 returns nullptr if size=0
     auto* ptr = (!size && range_.rank())
                     ? static_cast<pointer>(std::malloc(size))
                     : allocator.allocate(size);