use public countries API for GraphQL examples #238

Job	Run time
search	3s
test (lib/metadata)	35s
test (lib/wasmextractor)	19s
test (lib/manifest)	31s
test (sdk/go)	30s
test (sdk/go/examples/graphql)	20s
test (sdk/go/examples/simple)	31s
test (sdk/go/examples/auth)	27s
test (sdk/go/examples/postgresql)	32s
test (sdk/go/examples/dgraph)	25s
test (sdk/go/examples/embedding)	19s
test (sdk/go/examples/vectors)	28s
test (sdk/go/examples/collections)	26s
test (sdk/go/examples/classification)	26s
test (sdk/go/examples/textgeneration)	29s
test (sdk/go/examples/http)	30s
test (sdk/go/templates/default)	30s
test (runtime)	14s
test (runtime/languages/golang/testdata)	25s
	8m 0s

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