Add comments about upgrading, formatting

Author: lukebakken

projects/Directory.Packages.props

@@ -9,6 +9,10 @@
     <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="17.9.0" />
     <PackageVersion Include="OpenTelemetry.Api" Version="1.7.0" />
     <PackageVersion Include="OpenTelemetry.Exporter.InMemory" Version="1.8.0" />
+    <!--
+      Note: do NOT upgrade the System.IO.Pipelines dependency unless necessary
+      See https://github.com/rabbitmq/rabbitmq-dotnet-client/pull/1481#pullrequestreview-1847905299
+    -->
     <PackageVersion Include="System.IO.Pipelines" Version="6.0.0" />
     <PackageVersion Include="System.Net.Http" Version="4.3.4" />
     <PackageVersion Include="WireMock.Net" Version="1.5.49" />
@@ -17,14 +21,20 @@
     <PackageVersion Include="xunit.runner.visualstudio" Version="2.5.7" />
     <PackageVersion Include="Xunit.SkippableFact" Version="1.4.13" />
   </ItemGroup>
-  <ItemGroup Condition="$(TargetFramework) == 'netstandard2.0'">
+  <ItemGroup Condition="$(TargetFramework)=='netstandard2.0'">
+    <!--
+      Note: do NOT upgrade these dependencies unless necessary
+      See:
+      * https://github.com/rabbitmq/rabbitmq-dotnet-client/pull/1481#pullrequestreview-1847905299
+      * https://github.com/rabbitmq/rabbitmq-dotnet-client/pull/1594
+    -->
     <PackageVersion Include="System.Diagnostics.DiagnosticSource" Version="6.0.0" />
     <PackageVersion Include="System.Memory" Version="4.5.5" />
-    <PackageVersion Include="System.Net.Http.Json" Version="6.0.0" />
-    <PackageVersion Include="System.Text.Json" Version="6.0.0" />
     <PackageVersion Include="System.Threading.Channels" Version="6.0.0" />
+    <PackageVersion Include="System.Text.Json" Version="6.0.0" />
+    <PackageVersion Include="System.Net.Http.Json" Version="6.0.0" />
   </ItemGroup>
-  <ItemGroup Condition="$(TargetFramework) == 'net472'">
+  <ItemGroup Condition="$(TargetFramework)=='net472'">
     <PackageVersion Include="System.Text.Json" Version="6.0.0" />
   </ItemGroup>
   <ItemGroup Condition="'$(TargetFrameworkIdentifier)' == '.NETFramework'">