add SIP for governance.md #6258

Job	Run time
Build Spin (windows-latest)	36s
Build Spin Ubuntu	39s
all-integration-tests	34s
Build Spin (macos-13)	39s
Build Spin static (aarch64, aarch64-unknown-linux-musl)	49s
Build Spin static (amd64, x86_64-unknown-linux-musl)	51s
Review new dependencies for known vulnerabilities	4s
Build Spin (macos-14)	40s
Run release build steps (ubuntu-20.04, amd64, --features openssl/vendored, target/release)	51s
Run release build steps (ubuntu-20.04, aarch64, --features openssl/vendored --target aarch64-unkn...	52s
Lint Rust	50s
Run release build steps (macos-13, amd64, target/release)	49s
Test Spin (ubuntu-22.04-4core-spin)	34s
Run release build steps (macos-14, aarch64, target/release)	52s
Test Spin (macos-14)	37s
Run release build steps (windows-latest, amd64, .exe, target/release)	42s
	10m 59s

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