Update validate-pyproject requirement in /cratedb_sqlparse_py (#243)

Updates the requirements on [validate-pyproject](https://github.com/abravalheri/validate-pyproject) to permit the latest version.
- [Release notes](https://github.com/abravalheri/validate-pyproject/releases)
- [Changelog](https://github.com/abravalheri/validate-pyproject/blob/main/CHANGELOG.rst)
- [Commits](abravalheri/validate-pyproject@v0.0.1...v0.25)

---
updated-dependencies:
- dependency-name: validate-pyproject
  dependency-version: '0.25'
  dependency-type: direct:development
...

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cratedb_sqlparse_py/pyproject.toml

@@ -73,7 +73,7 @@ dev = [
   "pytest<9",
   "pytest-cov<8",
   "ruff<0.16",
-  "validate-pyproject<0.25",
+  "validate-pyproject<0.26",
 ]
 generate = [
   "antlr4-tools<0.3",