update recommended CometBFT to 0.37.15 #2040

Job	Run time
rust-docs	1m 33s
build-binaries	1m 32s
lints	1m 40s
check-packages	1m 14s
build-wasm (wasm, build-wasm-scripts, wasm/tx_.wasm wasm/vp_.wasm wasm/checksums.json )	1m 34s
build-wasm (wasm-for-tests, build-wasm-tests-scripts, wasm_for_tests/*.wasm)	1m 32s
test-ledger-app	1m 44s
changelog	0s
test-unit	1s
test-wasm	1s
test-e2e-with-device-automation	1s
check-benchmarks	1s
test-integration	1s
test-e2e	1s
upload-coverage	1s
	10m 56s

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