fix two typos

Author: Tony Worm

docs/code/getting-started/code-generation/adhoc-mod-snippet.cue

@@ -4,7 +4,7 @@ import (
 	"github.com/hofstadter-io/hof/schema/gen"
 }
 
-foo: gen.Generator: {
+foo: gen.Generator & {
 	@gen(foo)
 
 	// input data

docs/content/first-example/simple-server/_index.md

@@ -13,7 +13,7 @@ create a generator for a simple Go REST server.
 {{</lead>}}
 
 The full code for this section can be found on GitHub
-[code/first-example/simple-server](https://github.com/hofstadter-io/hof-docs/tree/main/code/first-example/simple-server)
+[docs/code/first-example/simple-server](https://github.com/hofstadter-io/hof/tree/_dev/docs/code/first-example/simple-server)
 
 
 {{<childpages childBriefs="true">}}