decorate the version in the csproj file

After some tought, I prefer decorating the csproj file vs using xml xpath in the release-please configuration because it makes it clear in the project file that the version is being managed by release-please.

Author: jsonbailey

pkgs/dotnet-server-sdk-consul/src/LaunchDarkly.ServerSdk.Consul.csproj

@@ -1,6 +1,8 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
+    <!--x-release-please-start-version-->
     <Version>5.0.0</Version>
+    <!--x-release-please-end-->
     <TargetFrameworks>netstandard2.0;net462</TargetFrameworks>
     <PackageId>LaunchDarkly.ServerSdk.Consul</PackageId>
     <AssemblyName>LaunchDarkly.ServerSdk.Consul</AssemblyName>

pkgs/dotnet-server-sdk-dynamodb/src/LaunchDarkly.ServerSdk.DynamoDB.csproj

@@ -1,6 +1,8 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
+    <!--x-release-please-start-version-->
     <Version>4.0.0</Version>
+    <!--x-release-please-end-->
     <TargetFrameworks>netstandard2.0;net462</TargetFrameworks>
     <PackageId>LaunchDarkly.ServerSdk.DynamoDB</PackageId>
     <AssemblyName>LaunchDarkly.ServerSdk.DynamoDB</AssemblyName>

pkgs/dotnet-server-sdk-redis/src/LaunchDarkly.ServerSdk.Redis.csproj

@@ -1,6 +1,8 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
+    <!--x-release-please-start-version-->
     <Version>5.0.0</Version>
+    <!--x-release-please-end-->
     <TargetFrameworks>netstandard2.0;net462</TargetFrameworks>
     <AssemblyName>LaunchDarkly.ServerSdk.Redis</AssemblyName>
     <OutputType>Library</OutputType>

pkgs/shared/common-json-net/src/LaunchDarkly.CommonSdk.JsonNet.csproj

@@ -1,6 +1,8 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
+    <!--x-release-please-start-version-->
     <Version>7.0.0</Version>
+    <!--x-release-please-end-->
     <!-- The BUILDFRAMEWORKS variable allows us to override the target frameworks with a
      single framework that we are testing; this allows us to test with older SDK
      versions that would error out if they saw any newer target frameworks listed

pkgs/shared/common/src/LaunchDarkly.CommonSdk.csproj

@@ -1,6 +1,8 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
+    <!--x-release-please-start-version-->
     <Version>7.0.0</Version>
+    <!--x-release-please-end-->
     <!-- The BUILDFRAMEWORKS variable allows us to override the target frameworks with a
      single framework that we are testing; this allows us to test with older SDK
      versions that would error out if they saw any newer target frameworks listed