Update version of Go in go.mod to 1.22.3

This specifies the point release to appease the CodeQL checker.

We may be able to revert to specifying only major and minor versions in
future.

Author: StevenMaude

go.mod

@@ -1,6 +1,6 @@
 module github.com/sensiblecodeio/associate-eip
 
-go 1.19
+go 1.22.3
 
 require github.com/aws/aws-sdk-go v1.53.4