bench: bump aca-model pin to feature/categorical-scalarint HEAD

PR #350 tightens `@categorical` to require `ScalarInt` field
annotations. The benchmarks-cuda12 env still pulls aca-model from the
pre-#350 sha (`9ac2043`), which annotates fields as `int` and fails
the new decoration-time gate during `setup_cache`.

Point the pin at the aca-model #350 cascade branch
(`feature/categorical-scalarint`, head `b807b28`) until both PRs land.
After aca-model PR#10 and pylcm#350 merge, revert to a `main`-tracking
sha.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: hmgaudecker

pyproject.toml

@@ -98,7 +98,7 @@ tests-cuda13 = { features = [ "tests", "cuda13" ], solve-group = "cuda13" }
 tests-metal = { features = [ "tests", "metal" ], solve-group = "metal" }
 type-checking = { features = [ "type-checking", "tests" ], solve-group = "default" }
 [tool.pixi.feature.benchmarks.pypi-dependencies]
-aca-model = { git = "https://github.com/OpenSourceEconomics/aca-model.git", rev = "9ac20430f499a8b1cdb056af85bc2a26e850bad2" }
+aca-model = { git = "https://github.com/OpenSourceEconomics/aca-model.git", rev = "b807b287a3478e8946f6e9cf90fe6f9f7da12b1d" }
 [tool.pixi.feature.cuda12]
 platforms = [ "linux-64" ]
 system-requirements = { cuda = "12" }