Explain `assert_macros` in the guide (#2531) #9128

Job	Run time
Test contracts artifacts	2m 45s
Test coverage	2m 22s
Test Cheatnet	1m 19s
build-test-forge-e2e-nextest-archive	1m 9s
Test Forge Runner	30s
Test Forge / Unit and Integration Tests	17m 23s
clippy	26s
rustfmt	9s
scarbfmt	6s
Test Building Docs	13m 0s
Test Cast	13m 36s
Test Conversions	24s
Test Forge Scarb Plugin	15s
Test Scarb Api	1m 53s
Test Shared	13s
Check typos	9s
Test Forge / E2E Tests (1)	2m 34s
Test Forge / E2E Tests (2)	3m 47s
Test Forge / E2E Tests (3)	2m 38s
Test Forge / E2E Tests (4)	4m 2s
Test Forge / E2E Tests (5)	2m 34s
Test Forge / E2E Tests (6)	2m 47s
Test Forge / E2E Tests (7)	2m 20s
Test Forge / E2E Tests (8)	2m 23s
	1h 18m 44s

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