build(deps): update dependency portable.system.datetimeonly to v9

Author: renovate[bot]

tests/Directory.Packages.props

@@ -13,7 +13,7 @@
     <PackageVersion Include="Npgsql" Version="7.0.9" />
     <PackageVersion Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="8.0.11" />
     <PackageVersion Include="NSubstitute" Version="5.3.0" />
-    <PackageVersion Include="Portable.System.DateTimeOnly" Version="8.0.2" />
+    <PackageVersion Include="Portable.System.DateTimeOnly" Version="9.0.0" />
     <PackageVersion Include="Respawn" Version="6.2.1" />
     <PackageVersion Include="Testcontainers.PostgreSql" Version="4.1.0" />
     <PackageVersion Include="xunit" Version="2.9.2" />

tests/Expressions.EntityFrameworkCore.Tests/packages.lock.json

@@ -38,9 +38,9 @@
       },
       "Portable.System.DateTimeOnly": {
         "type": "Direct",
-        "requested": "[8.0.2, )",
-        "resolved": "8.0.2",
-        "contentHash": "YiEjg6vXK4y2mEwD8F2rKc0XOWW7aRNC1lM+afPUmwQfZ75rX8py6FuC2S0JhBHRHiTl9skKsgPAgSlGipmOPA=="
+        "requested": "[9.0.0, )",
+        "resolved": "9.0.0",
+        "contentHash": "JOr7+/s1MSjpg4m2lIFsFaA7bF0DEWq2Kg4gr7HWqlrwVaiqmJe/YChzCPUZ9qhYD/3YEDvp5C65PrqBMooh7A=="
       },
       "xunit": {
         "type": "Direct",