Unpin GO minor version

Aligns with what is being used for IAC and SC.

Signed-off-by: Paulo Gomes <paulo.gomes@weave.works>

Author: Paulo Gomes

Dockerfile.test

@@ -1,5 +1,5 @@
 ARG BASE_VARIANT=alpine
-ARG GO_VERSION=1.17.6
+ARG GO_VERSION=1.17
 ARG XX_VERSION=1.1.0
 
 ARG LIBGIT2_IMG