Update release notes.

kurtschelfthout · kurtschelfthout · commit 58a35faf970b · 2021-05-08T17:40:05.000+01:00
diff --git a/FsCheck Release Notes.md b/FsCheck Release Notes.md
@@ -1,4 +1,4 @@
-### 2.15.3 - To be released
+### 2.15.3 - 8 May 2021
 
 * Allow shrinking private unions. (by Sander van Dijk)
 

Original file line number	Diff line number	Diff line change
`@@ -1,4 +1,4 @@`
`1`		`-### 2.15.3 - To be released`
	`1`	`+### 2.15.3 - 8 May 2021`
`2`	`2`
`3`	`3`	`* Allow shrinking private unions. (by Sander van Dijk)`
`4`	`4`