Update version to v1.8.1

Benjamin Rewis · Benjamin Rewis · commit 9a6cd355da87 · 2021-12-08T11:10:01.000-05:00
diff --git a/version/version.go b/version/version.go
@@ -7,4 +7,4 @@
 package version // import "go.mongodb.org/mongo-driver/version"
 
 // Driver is the current version of the driver.
-var Driver = "v1.8.1+prerelease"
+var Driver = "v1.8.1"
