Fix printing errors in oumi env for non-string values. (#1565)

Author: taenin

src/oumi/cli/env.py

@@ -140,11 +140,11 @@ def env():
         cuda_table = Table(show_header=False, show_lines=False)
         cuda_table.add_row("CUDA available", str(torch.cuda.is_available()))
         if torch.cuda.is_available():
-            cuda_table.add_row("CUDA version", torch.version.cuda)
+            cuda_table.add_row("CUDA version", str(torch.version.cuda))
             cuda_table.add_row(
                 "cuDNN version", format_cudnn_version(torch.backends.cudnn.version())
             )
-            cuda_table.add_row("Number of GPUs", torch.cuda.device_count())
+            cuda_table.add_row("Number of GPUs", str(torch.cuda.device_count()))
             cuda_table.add_row("GPU type", torch.cuda.get_device_name())
             total_memory_gb = float(torch.cuda.mem_get_info()[1]) / float(
                 1024 * 1024 * 1024