Add another C++11 ABI docker reference (#8649)

Author: tengyifei

README.md

@@ -284,6 +284,7 @@ The torch wheel version `2.7.0.dev20250124+cpu` can be found at https://download
 | Version | Cloud TPU VMs Docker |
 | --- | ----------- |
 | 2.6 | `us-central1-docker.pkg.dev/tpu-pytorch-releases/docker/xla:r2.6.0_3.10_tpuvm` |
+| 2.6 (C++11 ABI) | `us-central1-docker.pkg.dev/tpu-pytorch-releases/docker/xla:r2.6.0_3.10_tpuvm_cxx11` |
 | 2.5 | `us-central1-docker.pkg.dev/tpu-pytorch-releases/docker/xla:r2.5.0_3.10_tpuvm` |
 | 2.4 | `us-central1-docker.pkg.dev/tpu-pytorch-releases/docker/xla:r2.4.0_3.10_tpuvm` |
 | 2.3 | `us-central1-docker.pkg.dev/tpu-pytorch-releases/docker/xla:r2.3.0_3.10_tpuvm` |