Fix deprecated code in docs

[skrawcz]

https://burr.dagworks.io/concepts/tracking/#debugging-via-reloading-prior-state is out dated.

The code is deprecated. It should be something like this instead:

from burr.tracking import LocalTrackingClient

prior_app_id = ... # some value
sequence_id = ... # None or some prior step
partition_key = "SOME_VALUE" # use None if not using a partition key

project_name = "PROEJCT_NAME"
tracker = LocalTrackingClient(project=project_name)
app = (
    ApplicationBuilder()
    .with_graph(base_graph) # your graph
    .initialize_from(
        tracker, # local tracker above
        resume_at_next_action=True, 
        default_state={}, # your default state
        default_entrypoint="SOME_DEFAULT", # your default entry point
        fork_from_app_id=prior_app_id,
        fork_from_sequence_id=sequence_id,
        fork_from_partition_key=partition_key
    )
    .with_tracker(tracker)  # tracking + checkpointing; one line 🪄.
    .build()
)

[danieltayal07]

pulled a request, please check is it ok?

or i have to do something else

Thank you so much for the opportunity!