Keylime-bot crashes on pull-request-responsibility check

[tuminoid]

As seen in PR #1150, the job [keylime-bot / pull-request-responsibility (pull_request_target)](https://github.com/keylime/rust-keylime/actions/runs/19503631530/job/55823854469?pr=1150) keylime-bot / pull-request-responsibility (pull_request_target) crashes:

 --- COPY-LABELS-LINKED --- 
/home/runner/work/_actions/actions-automation/pull-request-responsibility/main/src/copy-labels-linked:78: SyntaxWarning: invalid escape sequence '\s'
  regex = re.compile("(close[sd]?|fix|fixe[sd]?|resolve[sd]?)\s*:?\s+#(\d+)", re.I)
keylime/rust-keylime#1150:
Run if [[ "request,assign,copy-labels-linked" =~ (^|,)"request"(,|$) ]]; then
 --- REQUEST --- 
Traceback (most recent call last):
  File "/home/runner/work/_actions/actions-automation/pull-request-responsibility/main/src/request", line 205, in <module>
    main()
  File "/home/runner/work/_actions/actions-automation/pull-request-responsibility/main/src/request", line 202, in main
    auto_request(pr=pr, org=org, token=token, team_name=team_name, num_to_request=num_to_request)
  File "/home/runner/work/_actions/actions-automation/pull-request-responsibility/main/src/request", line 160, in auto_request
    migrate(requesting, suggested, availability, len(requesting) + 1) # Get one suggested.
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/runner/work/_actions/actions-automation/pull-request-responsibility/main/src/request", line 88, in migrate
    one = random.sample(src, 1)[0]
          ^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.12/random.py", line 413, in sample
    raise TypeError("Population must be a sequence.  "
TypeError: Population must be a sequence.  For dicts or sets, use sorted(d).
Error: Process completed with exit code 1.

[tuminoid]

/cc @ansasaki