build(deps): update regex requirement from >=2023.0.0 to >=2026.7.19 in /demo/blueprint_parser_creator

[dependabot]

Updates the requirements on regex to permit the latest version.

Changelog

Sourced from regex's changelog.

Version: 2026.7.19

Git issue 607: SIGSEGV: NULL pointer dereference in `basic_match()` when `(?R)`/`(?0)` recursion is used inside a fuzzy-matching quantifier
Git issue 608: SIGSEGV: out-of-bounds read in `bytes1_char_at()` with `DOTALL` + a fuzzy constraint + `(?r)` reverse-direction matching

Version: 2026.7.10

Clarified that the POSIX flag makes it look for only the longest overall match.
Git issue 606: regex's compiled-pattern cache eviction is not free-threading-safe

Version: 2026.6.28

Git issue 604: regex fails on free-threading python because setlocale is not thread-safe

Version: 2026.5.9

Reverse matching with full unicode casefolding could lead to out-of-range string indexes.

Version: 2026.4.4

A fix for older Python versions before free-threading was  supported.

Version: 2026.4.3

More fixes for free-threading.

Version: 2026.3.32

Fixed segfault.

Version: 2026.3.31

Fixed bug again.

Version: 2026.3.30

Fixed bug.

Version: 2026.3.28

Fixed version.

Version: 2026.3.27

Various fixes, including ones to improve free-threading support.

Version: 2026.2.28

Replaced atomic operations with mutex on pattern object for free-threaded Python.

... (truncated)

Commits

• 0525aff Git issue 608: SIGSEGV: out-of-bounds read in bytes1_char_at() with `DOTALL...
• 07dfa3b Git issue 607: SIGSEGV: NULL pointer dereference in basic_match() when `(?R...
• e7716da Python 3.15 not released yet.
• e204ddb Git issue 606: regex's compiled-pattern cache eviction is not free-threadin...
• d7e1927 Updated main.yml for Python 3.15.
• b18daa6 Git issue 604: regex fails on free-threading python because setlocale is not ...
• e57d185 Reverse matching with full unicode casefolding lead to out-of-range string in...
• bc57b04 A fix for older Python versions before free-threading was supported.
• 773e213 More fixes for free-threading.
• 5d51c75 Fixed segfault.
• Additional commits viewable in compare view

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[amirfz]

Superseded by #540, which folds all five blueprint_parser_creator bumps into one branch and fixes a real latent bug (ChatOpenAI import) the original PRs' CI couldn't catch since it doesn't run this demo's tests.

[dependabot]

OK, I won't notify you again about this release, but will get in touch when a new version is available. If you'd rather skip all updates until the next major or minor version, let me know by commenting @dependabot ignore this major version or @dependabot ignore this minor version. You can also ignore all major, minor, or patch releases for a dependency by adding an ignore condition with the desired update_types to your config file.

If you change your mind, just re-open this PR and I'll resolve any conflicts on it.