Fix dynamic metadata object in docs #10152

Job	Run time
Rego PR checks	1m 25s
Go Lint	1m 38s
YAML Lint	19s
Generate Code	1m 13s
Go Test (linux)	4m 55s
Go Build (linux amd64)	2m 23s
Go Test (darwin)	4m 28s
Check Generated	24s
Go Build (linux arm64)	2m 15s
Go compat build/test (ubuntu-22.04, 1.20)	2m 51s
Go Build (linux arm64GO_TAGS="-tags=opa_no_oci")	2m 12s
Go compat build/test (macos-latest, 1.20)	4m 5s
Go Race Detector	6m 3s
Go Build (windows amd64)	2m 35s
WASM	8s
Go Build (darwin amd64)	1m 31s
docker image smoke test	31s
smoke-test-binaries (linux, ubuntu-22.04, opa_linux_amd64, amd64)	22s
smoke-test-binaries (linux, ubuntu-22.04, opa_linux_amd64_static, amd64, disabled)	12s
smoke-test-binaries (darwin, macos-latest, opa_darwin_amd64, amd64)	24s
smoke-test-binaries (windows, windows-latest, opa_windows_amd64.exe, amd64)	33s
	40m 27s

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