chore(deps): update rust crate regex to v1.12.3

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
regex	dev-dependencies	patch	1.12.2 → 1.12.3

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Release Notes

rust-lang/regex (regex)

v1.12.3

===================
This release excludes some unnecessary things from the archive published to
crates.io. Specifically, fuzzing data and various shell scripts are now
excluded. If you run into problems, please file an issue.

Improvements:

• #​1319:
  Switch from a Cargo exclude list to an include list, and exclude some
  unnecessary stuff.

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📊 iai-callgrind Benchmark Results

✅ 1 Improvement(s)

| Benchmark | Base | PR | Change | % |
|-----------|------|----|---------|
| iai_algos::corner_to_corner_idastar | 194,425 | 194,117 | -308 | -0.16% |

➡️ 19 Unchanged (within ±0.1%)

Click to expand

Benchmark	Instructions
iai_algos::corner_to_corner_astar	163,252
iai_algos::corner_to_corner_bfs	2,947,649
iai_algos::corner_to_corner_bfs_bidirectional	3,895,956
iai_algos::corner_to_corner_dfs	3,577,719
iai_algos::corner_to_corner_dijkstra	3,165,305
iai_algos::corner_to_corner_fringe	216,764
iai_algos::corner_to_corner_iddfs	3,718,131
iai_algos::no_path_astar	3,923,002
iai_algos::no_path_bfs	2,756,527
iai_algos::no_path_bfs_bidirectional	3,434,038
iai_algos::no_path_dfs	3,615,384
iai_algos::no_path_dijkstra	3,089,064
iai_algos::no_path_fringe	4,417,030
iai_edmondskarp::wikipedia_example_dense	38,122
iai_edmondskarp::wikipedia_example_sparse	65,600
iai_kuhn_munkres::kuhn_munkres_size_128	6,400,113
iai_kuhn_munkres::kuhn_munkres_size_32	363,151
iai_kuhn_munkres::kuhn_munkres_size_64	1,791,095
iai_separate_components::bench_separate_components	16,588,867

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iai-callgrind measures instructions executed, which is deterministic and not affected by system load.