docs: Explain backwards compat in SDK use case #23

Job	Run time
YAML Lint	20s
Rego PR checks	1m 31s
Generate Code	1m 10s
Go Lint	1m 52s
WASM	9s
Go Test (linux)	32s
Go Build (linux amd64)	31s
Go Test (darwin)	20s
Check Generated	32s
Go Build (linux arm64)	32s
Go compat build/test (ubuntu-22.04, 1.21)	33s
Go Build (linux arm64GO_TAGS="-tags=opa_no_oci")	33s
Go Race Detector	32s
Go compat build/test (macos-14, 1.21)	20s
Go Build (windows amd64)	32s
Go Build (darwin amd64)	19s
Go Build (darwin arm64)	1s
smoke-test-binaries	1s
docker image smoke test	1s
	10m 21s

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