[0.5 release] Update pyproject with torch dependencies (#8038)

Author: SS-JIA

.ci/scripts/setup-linux.sh

@@ -23,4 +23,3 @@ fi
 # of nightly. This allows CI to test against latest commits from PyTorch
 install_executorch "use-pt-pinned-commit"
 build_executorch_runner "${BUILD_TOOL}"
-do_not_use_nightly_on_ci

pyproject.toml

@@ -65,6 +65,9 @@ dependencies=[
   "ruamel.yaml",
   "sympy",
   "tabulate",
+  "torch==2.6.0",
+  "torchaudio==2.6.0",
+  "torchvision==0.21.0",
   "typing-extensions",
 ]