404 on GitLab causes yaml.parser.ParserError

[tueda]

.pre-commit-config.yaml:

repos:
-   repo: https://gitlab.com/pycqa/flake8
    rev: 3.9.2
    hooks:
    -   id: flake8

Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/home/tueda/work/py-check-updates/check_updates/main.py", line 86, in main
    for updates, content in check_updates(opts.path if opts.path else None):
                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/tueda/work/py-check-updates/check_updates/main.py", line 52, in check_updates
    return tuple(_check_file(f) for f in files)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/tueda/work/py-check-updates/check_updates/main.py", line 52, in <genexpr>
    return tuple(_check_file(f) for f in files)
                 ^^^^^^^^^^^^^^
  File "/home/tueda/work/py-check-updates/check_updates/main.py", line 64, in _check_file
    return pre_commit.update_pre_commit(str(file))
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/tueda/work/py-check-updates/check_updates/pre_commit.py", line 20, in update_pre_commit
    config, content = analyze_pre_commit_config(filename)
                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/tueda/work/py-check-updates/check_updates/pre_commit.py", line 94, in analyze_pre_commit_config
    languages = analyze_pre_commit_hooks(name, rev)
                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/tueda/work/py-check-updates/check_updates/pre_commit.py", line 164, in analyze_pre_commit_hooks
    data = yaml.load(_get_pre_commit_hook_impl(name, rev), Loader=yaml.SafeLoader)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/tueda/work/py-check-updates/.venv/lib/python3.11/site-packages/yaml/__init__.py", line 81, in load
    return loader.get_single_data()
           ^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/tueda/work/py-check-updates/.venv/lib/python3.11/site-packages/yaml/constructor.py", line 49, in get_single_data
    node = self.get_single_node()
           ^^^^^^^^^^^^^^^^^^^^^^
  File "/home/tueda/work/py-check-updates/.venv/lib/python3.11/site-packages/yaml/composer.py", line 39, in get_single_node
    if not self.check_event(StreamEndEvent):
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/tueda/work/py-check-updates/.venv/lib/python3.11/site-packages/yaml/parser.py", line 98, in check_event
    self.current_event = self.state()
                         ^^^^^^^^^^^^
  File "/home/tueda/work/py-check-updates/.venv/lib/python3.11/site-packages/yaml/parser.py", line 171, in parse_document_start
    raise ParserError(None, None,
yaml.parser.ParserError: expected '<document start>', but found '<scalar>'
  in "<unicode string>", line 7, column 1:
    <meta http-equiv="refresh" conte ...
    ^