Fix readme links

CHANGELOG.md

@@ -1,3 +1,6 @@
+### 6.4.2
+- Fix README links in NuGet package.
+
 ### 6.4.0
 - **Introduced a new configuration API replacing the builder pattern**:
 
@@ -21,7 +24,7 @@
   });
   ```
 
-  The old API is still available it's just marked with the `  [Obsolete]` attribute.
+  The old API is still available it's just marked with the `[Obsolete]` attribute.
 
 - **`GetAllValues()` and `GetAllValuesAsync()`**:  
   These methods are now evaluating all feature flags and settings into an `IDictionary<string, object>`.

README.md

@@ -10,9 +10,9 @@ https://configcat.com
 
 ConfigCat SDK for .NET provides easy integration for your application to ConfigCat.
 
-ConfigCat is a feature flag and configuration management service that lets you separate releases from deployments. You can turn your features ON/OFF using <a href="https://app.configcat.com" target="_blank">ConfigCat Dashboard</a> even after they are deployed. ConfigCat lets you target specific groups of users based on region, email or any other custom user attribute.
+ConfigCat is a feature flag and configuration management service that lets you separate releases from deployments. You can turn your features ON/OFF using [ConfigCat Dashboard](https://app.configcat.com) even after they are deployed. ConfigCat lets you target specific groups of users based on region, email or any other custom user attribute.
 
-ConfigCat is a <a href="https://configcat.com" target="_blank">hosted feature flag service</a>. Manage feature toggles across frontend, backend, mobile, desktop apps. <a href="https://configcat.com" target="_blank">Alternative to LaunchDarkly</a>. Management app + feature flag SDKs.
+ConfigCat is a [hosted feature flag service](https://configcat.com). Manage feature toggles across frontend, backend, mobile, desktop apps. [Alternative to LaunchDarkly](https://configcat.com). Management app + feature flag SDKs.
 
 [![Build status](https://ci.appveyor.com/api/projects/status/3kygp783vc2uv9xr?svg=true)](https://ci.appveyor.com/project/ConfigCat/net-sdk) [![NuGet Version](https://buildstats.info/nuget/ConfigCat.Client)](https://www.nuget.org/packages/ConfigCat.Client/)
 [![Sonar Coverage](https://img.shields.io/sonar/coverage/net-sdk?logo=SonarCloud&server=https%3A%2F%2Fsonarcloud.io)](https://sonarcloud.io/project/overview?id=net-sdk) 
@@ -36,7 +36,7 @@ dotnet add package ConfigCat.Client
 using ConfigCat.Client;
 ```
 
-### 3. Go to the <a href="https://app.configcat.com/sdkkey" target="_blank">ConfigCat Dashboard</a> to get your *SDK Key*:
+### 3. Go to the [ConfigCat Dashboard](https://app.configcat.com/sdkkey) to get your *SDK Key*:
 ![SDK-KEY](https://raw.githubusercontent.com/ConfigCat/.net-sdk/master/media/readme02-3.png  "SDK-KEY")
 
 ### 4. Create a **ConfigCat** client instance: