Increment version for data/azcosmos releases (Azure#17869)

Increment package version after release of data/azcosmos

Author: azure-sdk

sdk/data/azcosmos/CHANGELOG.md

@@ -1,5 +1,15 @@
 # Release History
 
+## 0.3.1 (Unreleased)
+
+### Features Added
+
+### Breaking Changes
+
+### Bugs Fixed
+
+### Other Changes
+
 ## 0.3.0 (2022-05-10)
 
 ### Features Added

sdk/data/azcosmos/version.go

@@ -4,4 +4,4 @@
 package azcosmos
 
 // serviceLibVersion is the semantic version (see http://semver.org) of this module.
-const serviceLibVersion = "v0.3.0" //nolint
+const serviceLibVersion = "v0.3.1" //nolint