Update src/Middleware/OutputCaching/test/MemoryOutputCacheStoreTests.cs

Co-authored-by: Rick Anderson <[email protected]>

Author: profet23

src/Middleware/OutputCaching/test/MemoryOutputCacheStoreTests.cs

@@ -219,7 +219,7 @@ public async Task ReplacedEntries_AreNotRemovedFromTags()
 
         HashSet<string> tag1s, tag2s;
 
-        // Wait for the hashset to be removed as it happens on a separate thread
+        // Wait for the tag2 HashSet to be removed by the background expiration thread.
 
         using var cts = new CancellationTokenSource(TimeSpan.FromSeconds(30));