Update version to 1.4.6+prerelease

Benjamin Rewis · Benjamin Rewis · commit c1a6bf154ec5 · 2021-01-19T12:19:08.000-08:00
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 = "v1.4.5"
+var Driver = "v1.4.6+prerelease"
