docs: Updating Rego examples in docs to be 1.0 compliant #9474

Job	Run time
Go Lint	1m 39s
Rego PR checks	1m 25s
Generate Code	1m 8s
WASM	16s
Go Test (linux)	3m 50s
Go Build (linux amd64)	2m 28s
Go Test (darwin)	6m 43s
Check Generated	33s
Go Build (linux arm64)	2m 15s
Go Build (windows)	2m 42s
Go compat build/test (ubuntu-22.04, 1.19)	3m 31s
Go Race Detector	5m 41s
Go Build (darwin)	1m 48s
Go compat build/test (macos-latest, 1.19)	6m 7s
docker image smoke test	32s
smoke-test-binaries (ubuntu-22.04, opa_linux_amd64)	21s
smoke-test-binaries (ubuntu-22.04, opa_linux_amd64_static, disabled)	18s
smoke-test-binaries (macos-latest, opa_darwin_amd64)	33s
smoke-test-binaries (windows-latest, opa_windows_amd64.exe)	31s
	42m 21s

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