Bump Apache.Avro from 1.11.3 to 1.12.0 in /src/net

Bumps Apache.Avro from 1.11.3 to 1.12.0.

---
updated-dependencies:
- dependency-name: Apache.Avro
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

src/net/KEFCore.SerDes.Avro.Compiler/KEFCore.SerDes.Avro.Compiler.csproj

@@ -23,6 +23,7 @@
  </ItemGroup>
 
  <ItemGroup>
+ <PackageReference Include="Apache.Avro" Version="1.12.0" />
  <PackageReference Include="MASES.KNet.Serialization.Avro" Version="2.8.0" />
  </ItemGroup>