Update nightly pin

ghstack-source-id: 249496e
Pull Request resolved: #7010

Author: tugsbayasgalan

.ci/docker/ci_commit_pins/pytorch.txt

@@ -1 +1 @@
-19eff28ff3f19b50da46f5a9ff5f4d4d213806fe
+ac47a2d9714278889923ddd40e4210d242d8d4ee

install_requirements.py

@@ -112,7 +112,7 @@ def python_is_compatible():
 # NOTE: If a newly-fetched version of the executorch repo changes the value of
 # NIGHTLY_VERSION, you should re-run this script to install the necessary
 # package versions.
-NIGHTLY_VERSION = "dev20241112"
+NIGHTLY_VERSION = "dev20241121"
 
 # The pip repository that hosts nightly torch packages.
 TORCH_NIGHTLY_URL = "https://download.pytorch.org/whl/nightly/cpu"