Fixes to CHANGELOG to release Azure.Core.Experimental (Azure#26859)

* update changelog

* disable flaky tests

Author: annelo-msft

sdk/core/Azure.Core.Experimental/CHANGELOG.md

@@ -11,10 +11,6 @@
 - `MessageWithMetadata` is now in the `Azure` namespace rather than `Azure.Messaging`.
 - Changed `ContentType` property of `MessageWithMetadata` from a `string` to a `ContentType`
 
-### Bugs Fixed
-
-### Other Changes
-
 ## 0.1.0-preview.19 (2022-01-11)
 
 ### Features Added

sdk/monitor/Azure.Monitor.OpenTelemetry.Exporter/tests/Azure.Monitor.OpenTelemetry.Exporter.Tests/OfflineStorageTests.cs

@@ -37,7 +37,7 @@ static OfflineStorageTests()
             HttpPipelineHelper.MinimumRetryInterval = 6000;
         }
 
-        [Fact]
+        [Fact(Skip = "https://github.com/Azure/azure-sdk-for-net/issues/26783")]
         public void Success200()
         {
             var activity = CreateActivity("TestActivity");
@@ -92,7 +92,7 @@ public void FailureResponseCode500()
             transmitter.storage.GetBlob().Lease(1000).Delete();
         }
 
-        [Fact]
+        [Fact(Skip = "https://github.com/Azure/azure-sdk-for-net/issues/26783")]
         public void FailureResponseCode429()
         {
             var activity = CreateActivity("TestActivity");
@@ -122,7 +122,7 @@ public void FailureResponseCode429()
             transmitter.storage.GetBlob().Lease(1000).Delete();
         }
 
-        [Fact]
+        [Fact(Skip = "https://github.com/Azure/azure-sdk-for-net/issues/26783")]
         public void FailureResponseCode206()
         {
             var activity1 = CreateActivity("TestActivity1");