Update release_versions.sh for ExecuTorch to 1.3.1 (#8123)

Technically we haven't published 1.3.0

But we already published maven 1.3.0 and realized we still need to do
patches.

So, just to be consistent everywhere (e.g., pypi, maven) we are using
1.3.1 everywhere now

Author: mergennachin

release/release_versions.sh

@@ -9,7 +9,7 @@ TORCHCOMMS_VERSION=${TORCHCOMMS_VERSION:-0.2.0}
 TRITON_VERSION=${TRITON_VERSION:-3.3.0}
 TORCHTEXT_VERSION=${TORCHTEXT_VERSION:-0.18.0}
 TORCHREC_VERSION=${TORCHREC_VERSION:-1.5.0}
-EXECUTORCH_VERSION=${EXECUTORCH_VERSION:-1.3.0}
+EXECUTORCH_VERSION=${EXECUTORCH_VERSION:-1.3.1}
 TORCH_TENSORRT_VERSION=${TORCH_TENSORRT_VERSION:-2.12.0}
 TORCH_TENSORRT_RTX_VERSION=${TORCH_TENSORRT_VERSION}
 TORCHAO_VERSION=${TORCHAO_VERSION:-0.17.0}