Fix typo (#501)

Author: ErikEJ

release-notes/2.0/2.0.md

@@ -5,4 +5,4 @@ The following Microsoft.Data.SqlClient 2.0 preview releases have been shipped:
 | Release Date | Version | Notes |
 | :-- | :-- | :--: |
 | 2020/01/21 | 2.0.0-preview1.20021.1 | [release notes](2.0.0-preview1.md) |
-| 2020/03/24 | 2.0.0-preview1.20084.1 | [release notes](2.0.0-preview2.md) |
+| 2020/03/24 | 2.0.0-preview2.20084.1 | [release notes](2.0.0-preview2.md) |