Bump OpenTelemetry.Instrumentation.EntityFrameworkCore

Bumps [OpenTelemetry.Instrumentation.EntityFrameworkCore](https://github.com/open-telemetry/opentelemetry-dotnet-contrib) from 1.0.0-beta.7 to 1.0.0-beta.8.
- [Release notes](https://github.com/open-telemetry/opentelemetry-dotnet-contrib/releases)
- [Commits](open-telemetry/opentelemetry-dotnet-contrib@Instrumentation.MySqlData-1.0.0-beta.7...Instrumentation.EntityFrameworkCore-1.0.0-beta.8)

---
updated-dependencies:
- dependency-name: OpenTelemetry.Instrumentation.EntityFrameworkCore
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

src/Directory.Packages.props

@@ -18,7 +18,7 @@
     <PackageVersion Include="OpenTelemetry.Extensions.Propagators" Version="1.6.0" />
     <PackageVersion Include="OpenTelemetry.Instrumentation.AspNet" Version="1.6.0-beta.1" />
     <PackageVersion Include="OpenTelemetry.Instrumentation.AspNetCore" Version="1.5.1-beta.1" />
-    <PackageVersion Include="OpenTelemetry.Instrumentation.EntityFrameworkCore" Version="1.0.0-beta.7" />
+    <PackageVersion Include="OpenTelemetry.Instrumentation.EntityFrameworkCore" Version="1.0.0-beta.8" />
     <PackageVersion Include="OpenTelemetry.Instrumentation.GrpcNetClient" Version="1.5.1-beta.1" />
     <PackageVersion Include="OpenTelemetry.Instrumentation.Process" Version="0.5.0-beta.3" />
     <PackageVersion Include="OpenTelemetry.Instrumentation.Quartz" Version="1.0.0-alpha.3" />