build(deps): bump MySql.Data from 8.3.0 to 8.4.0

Bumps MySql.Data from 8.3.0 to 8.4.0.

---
updated-dependencies:
- dependency-name: MySql.Data
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

src/Directory.Packages.props

@@ -61,7 +61,7 @@
   <!-- MySql dependencies -->
   <ItemGroup>
     <PackageVersion Include="Akka.Persistence.MySql" Version="1.5.13" />
-    <PackageVersion Include="MySql.Data" Version="8.3.0" />
+    <PackageVersion Include="MySql.Data" Version="8.4.0" />
   </ItemGroup>
   <!-- Test dependencies -->
   <ItemGroup>