Update NuGet references for database drivers (#454)

To match up with SteeltoeOSS/Steeltoe#1670

Author: bart-vmware

Connectors/src/CosmosDb/Steeltoe.Samples.CosmosDb.csproj

@@ -7,7 +7,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.Azure.Cosmos" Version="3.57.*" />
+    <PackageReference Include="Microsoft.Azure.Cosmos" Version="3.58.*" />
     <PackageReference Include="Newtonsoft.Json" Version="13.0.*" />
     <PackageReference Include="Steeltoe.Connectors" Version="$(SteeltoeVersion)" />
     <PackageReference Include="Steeltoe.Management.Endpoint" Version="$(SteeltoeVersion)" />

Connectors/src/MongoDb/Steeltoe.Samples.MongoDb.csproj

@@ -7,7 +7,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="MongoDB.Driver" Version="3.6.*" />
+    <PackageReference Include="MongoDB.Driver" Version="3.7.*" />
     <PackageReference Include="Steeltoe.Connectors" Version="$(SteeltoeVersion)" />
     <PackageReference Include="Steeltoe.Management.Endpoint" Version="$(SteeltoeVersion)" />
   </ItemGroup>