Add curation for go cronexpr

The correct license is Apache-2.0 OR GPL-3.0-only which can be found
at https://github.com/hashicorp/cronexpr/blob/master/README.md

curations/go/golang/github.com/hashicorp/cronexpr.yaml

@@ -1,9 +1,9 @@
 coordinates:
-  type: go
-  provider: golang
-  namespace: github.com%2Fhashicorp
-  name: cronexpr
+    type: go
+    provider: golang
+    namespace: github.com%2Fhashicorp
+    name: cronexpr
 revisions:
-  v1.1.1:
-    licensed:
-      declared: Apache-2.0 OR GPL-3.0-only
+    v1.1.1:
+        licensed:
+            declared: Apache-2.0 OR GPL-3.0-only