Fix Pyenv for Codespaces (#23315)

Resolves: #23314

Author: anthonykim1

scripts/onCreateCommand.sh

@@ -12,15 +12,15 @@ command -v pyenv >/dev/null || export PATH="$PYENV_ROOT/bin:$PATH"
 source ~/.bashrc
 
 # Install Python via pyenv .
-pyenv install 3.8:latest 3.9:latest 3.10:latest 3.11:latest
+pyenv install 3.8.18 3.9:latest 3.10:latest 3.11:latest
 
 # Set default Python version to 3.8 .
 pyenv global 3.8.18
 
 npm ci
 
 # Create Virutal environment.
-pyenv exec python3.8 -m venv .venv
+pyenv exec python -m venv .venv
 
 # Activate Virtual environment.
 source /workspaces/vscode-python/.venv/bin/activate