chore(deps): Update prompt-toolkit requirement from ~=2.0.10 to ~=3.0.48 in /demo

[dependabot]

Updates the requirements on prompt-toolkit to permit the latest version.

Release notes

Sourced from prompt-toolkit's releases.

3.0.48

Fixes:

• Typing improvements:
  • Add @overload to contrib.regular_languages.compiler.Variables.get.
  • Use Sequence instead of list for words argument in completers.
• Improve ModalCursorShapeConfig:
  • Display an "underscore" cursor in Vi's "replace single" mode, like "replace" mode.
  • Display an "beam" cursor in Emacs (insert) mode.

Changelog

Sourced from prompt-toolkit's changelog.

3.0.48: 2024-09-25

Fixes:

• Typing improvements:
  • Add @overload to contrib.regular_languages.compiler.Variables.get.
  • Use Sequence instead of list for words argument in completers.
• Improve ModalCursorShapeConfig:
  • Display an "underscore" cursor in Vi's "replace single" mode, like "replace" mode.
  • Display an "beam" cursor in Emacs (insert) mode.

3.0.47: 2024-06-10

New features:

• Allow passing exception classes for KeyboardInterrupt and EOFError in PromptSession.

Fixes:

• Compute padding parameters for Box widget lazily.

3.0.46: 2024-06-04

Fixes:

• Fix pytest capsys fixture compatibility.

3.0.45: 2024-05-28

Fixes:

• Improve performance of GrammarCompleter (faster deduplication of completions).

3.0.44: 2024-05-27

New features:

• Accept os.PathLike in FileHistory (typing fix).

Fixes:

• Fix memory leak in filters.
• Improve performance of progress bar formatters.
• Fix compatibility when a SIGINT handler is installed by non-Python (Rust, C).
• Limit number of completions in buffer to 10k by default (for performance).

... (truncated)

Commits

• 435bd99 Release 3.0.48
• ae1d635 Fixup for previous cursorshapes commit (#1900). (#1920)
• df4e244 Update type definition for words argument in completers (#1889)
• 728983b Improve ModalCursorShapeConfig for various input modes (#1900)
• 75615b1 Add @​overload to contrib.regular_languages.compiler.Variables.get
• 6695411 Release 3.0.47
• 67e644b Small simplification in Screen code.
• 8889675 fix(Examples): address a typo in one of the examples
• 15f3aec Allow passing exception classes for KeyboardInterrupt and EOFError in PromptS...
• a04c37d Compute padding parameters for Box widget lazily.
• Additional commits viewable in compare view

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