MAINT: upgrade pydot

[dependabot]

Bumps the lock group with 1 update: pydot.

Updates pydot from 1.4.2 to 4.0.1

Changelog

Sourced from pydot's changelog.

4.0.1 (2025-06-17)

Fixed:

• Updated pyparsing to >=3.1.0. Required for pydot to function correctly. (#477)
• Parser: Fixed 'strict' handling. (#480) The parser wasn't capturing the 'strict' keyword when parsing dot data. Now it does.
• Parser: Support backslash continuation in quoted IDs. (#487)
• Parser: Support +-concatenated quoted strings. (#490)

4.0.0 (2025-05-04)

Added:

• Added initial type annotations. (#430) There are still a lot of Anys, but Pydot now officially supports type annotations.
• Added (fixed) complex edge parsing. (#467) The parser now supports edges that contain subgraph endpoints.

Changed:

• Simplify Common.get_top_graph_type with a default. (#437)
• Define parser elements in a separate GraphParser class. (#464) It's a user-transparent change, but now it's easier to debug, test, and modify the parser. See the related Pull Request for more information.
• Improve return values and typing of setters and getters. (#470)

Fixed:

• Avoid subprocess window creation within call_graphviz on Windows. (#431)
• Removed a blank line inserted after subgraphs in the to_string() output. (#434)
• Fixed the issue where the parser breaks off lines at hash symbol following a HTML tag (#451)

Removed:

• Removed old, unused Common.__get_attribute__. (#426)

3.0.4 (2025-01-05)

• Fixed capitalized keywords in labels being unquoted. (#449, #450)

3.0.3 (2024-11-30)

• Fixed numeric quoting behavior. (#439)

3.0.2 (2024-09-25)

... (truncated)

Commits

• b60b668 Preparing release 4.0.1
• 910b191 Prepare changelog for 4.0.1 (#491)
• f18cbcb Parser: Support +-concatenated quoted strings (#490)
• 015c0dc Parser: Support backslash continuation in quoted IDs (#487)
• 8f5e9bd (Nearly) complete dot_parser coverage (#482)
• 3a062bb Fix 'strict' handling in parser (#480)
• 89ba7d3 Add future.annotations imports (#478)
• bc7ffac Update pyparsing dependency (#477)
• 926c1c5 Drop Python 3.8 from CI, acknowledge it in readme (#475)
• c37e44b Back to development: 4.0.1
• Additional commits viewable in compare view

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