chore(go): Update golang version

Oluwole Fadeyi · Oluwole Fadeyi · commit 2394ac8a6375 · 2024-02-05T15:12:43.000Z
Update golang version to 1.21

Signed-off-by: Oluwole Fadeyi &lt;oluwole.fadeyi@venafi.com&gt;
diff --git a/go.mod b/go.mod
@@ -1,6 +1,6 @@
 module github.com/jetstack/preflight
 
-go 1.18
+go 1.21
 
 require (
 	github.com/Jeffail/gabs/v2 v2.7.0
