Bump pyarrow from 17.0.0 to 18.0.0

Bumps [pyarrow](https://github.com/apache/arrow) from 17.0.0 to 18.0.0.
- [Release notes](https://github.com/apache/arrow/releases)
- [Commits](apache/arrow@go/v17.0.0...apache-arrow-18.0.0)

---
updated-dependencies:
- dependency-name: pyarrow
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

pyproject.toml

@@ -7,6 +7,6 @@ requires-python = ">=3.12"
 dependencies = [
     "flask==3.*",
     "pandas==2.*",
-    "pyarrow==17.*",
+    "pyarrow==18.*",
     "pytest>=8.3.3",
 ]

requirements.txt

@@ -21,7 +21,7 @@ numpy==1.26.4
 packaging==24.2
 pandas==2.2.1
 pluggy==1.5.0
-pyarrow==17.0.0
+pyarrow==18.0.0
 pytest==8.3.3
 python-dateutil==2.9.0.post0
 pytz==2024.2