docs: add notes for SDK users upgrading #30

Job	Run time
Rego PR checks	1m 28s
YAML Lint	22s
Go Lint	2m 0s
Generate Code	1m 5s
Check Generated	36s
Go compat build/test (ubuntu-22.04, 1.21)	4m 5s
Go Test (linux)	5m 49s
Go Build (linux amd64)	2m 30s
Go compat build/test (macos-14, 1.21)	4m 50s
Go Test (darwin)	5m 8s
Go Build (linux arm64)	2m 16s
Go Race Detector	6m 1s
Go Build (linux arm64GO_TAGS="-tags=opa_no_oci")	2m 12s
Go Build (windows amd64)	2m 26s
WASM	8s
Go Build (darwin amd64)	2m 34s
Go Build (darwin arm64)	1m 6s
docker image smoke test	26s
smoke-test-binaries (linux, ubuntu-22.04, opa_linux_amd64, amd64)	11s
smoke-test-binaries (linux, ubuntu-22.04, opa_linux_amd64_static, amd64, disabled)	16s
smoke-test-binaries (darwin, macos-13, opa_darwin_amd64, amd64)	27s
smoke-test-binaries (darwin, macos-14, opa_darwin_arm64_static, arm64, disabled)	28s
smoke-test-binaries (windows, windows-latest, opa_windows_amd64.exe, amd64)	1m 27s
	47m 51s

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