Bump OpenTelemetry and OpenTelemetry.Exporter.InMemory

Bumps OpenTelemetry from 1.15.2 to 1.15.3
Bumps OpenTelemetry.Exporter.InMemory from 1.15.2 to 1.15.3

---
updated-dependencies:
- dependency-name: OpenTelemetry
  dependency-version: 1.15.3
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: OpenTelemetry.Exporter.InMemory
  dependency-version: 1.15.3
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

src/Directory.Packages.props

@@ -6,8 +6,8 @@
   <ItemGroup>
     <PackageVersion Include="MarkdownSnippets.MsBuild" Version="28.2.0" />
     <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="18.4.0" />
-    <PackageVersion Include="OpenTelemetry" Version="1.15.2" />
-    <PackageVersion Include="OpenTelemetry.Exporter.InMemory" Version="1.15.2" />
+    <PackageVersion Include="OpenTelemetry" Version="1.15.3" />
+    <PackageVersion Include="OpenTelemetry.Exporter.InMemory" Version="1.15.3" />
     <PackageVersion Include="Microsoft.Extensions.Logging" Version="10.0.6" />
     <PackageVersion Include="Polyfill" Version="10.3.0" />
     <PackageVersion Include="Verify" Version="31.16.1" />