Update vlsir requirement from <5.0.0,>=4.0.0 to >=4.0.0,<6.0.0

Updates the requirements on [vlsir](https://github.com/Vlsir/Vlsir) to permit the latest version.
- [Commits](Vlsir/Vlsir@v4.0.0...v5.0.0)

---
updated-dependencies:
- dependency-name: vlsir
  dependency-type: direct:production
...

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

pyproject.toml

@@ -91,7 +91,7 @@ tidy3d = [
   "tidy3d>=2.4.0,<2.5.0"
 ]
 vlsir = [
-  "vlsir>=4.0.0,<5.0.0",
+  "vlsir>=4.0.0,<6.0.0",
   "vlsirtools>=4.0.0,<6.0.0"
 ]
 web = [