fixed default_frame_type for O3
Fixed a typo causing this error @colm.talbot
File "/mnt/home/users/uib54_res/uib54028/mambaforge/envs/myenv/lib/python3.10/site-packages/bilby_pipe/job_creation/nodes/generation_node.py", line 46, in __init__
input_files_to_transfer.extend(self.resolve_frame_files)
File "/mnt/home/users/uib54_res/uib54028/mambaforge/envs/myenv/lib/python3.10/site-packages/bilby_pipe/job_creation/nodes/generation_node.py", line 103, in resolve_frame_files
data[det] = default_frame_type(det, self.trigger_time)
File "/mnt/home/users/uib54_res/uib54028/mambaforge/envs/myenv/lib/python3.10/site-packages/bilby_pipe/utils.py", line 919, in default_frame_type
run == "O3"
UnboundLocalError: local variable 'run' referenced before assignment