Update MongoDB drivers to 2.19.0 (#2245)

* Update MongoDB drivers to 2.19.0

Since previous versions to this have a known CVE lodged against them.

See: https://security.snyk.io/vuln/SNYK-DOTNET-MONGODBDRIVER-3329316

* update mongodriver minumum supported version documentation

Author: Mpdreamz

docs/supported-technologies.asciidoc

@@ -116,7 +116,7 @@ Automatic instrumentation is supported for the following data access technologie
 |<<setup-auto-instrumentation, Profiler auto instrumentation>>
 
 |MongoDB added[1.9]
-|MongoDB.Driver 2.4.4+
+|MongoDB.Driver 2.19.0+
 |<<setup-mongo-db, NuGet package>>
 
 |Oracle added[1.12]

src/instrumentations/Elastic.Apm.MongoDb/Elastic.Apm.MongoDb.csproj

@@ -26,7 +26,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="MongoDB.Driver.Core" Version="2.4.4" />
+    <PackageReference Include="MongoDB.Driver.Core" Version="2.19.0" />
   </ItemGroup>
 
   <ItemGroup>