Update docs

scripts/checks/coverage.sh

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+#!/usr/bin/env bash
+
+set -euo pipefail
+
+export COVERAGE=true
+export FOUNDRY_FUZZ_RUNS=10
+
+# Hardhat coverage
+hardhat coverage
+
+if [ "${CI:-"false"}" == "true" ]; then
+  # Foundry coverage
+  forge coverage --report lcov --ir-minimum
+  # Remove zero hits
+  sed -i '/,0/d' lcov.info
+fi
+
+# Reports are then uploaded to Codecov automatically by workflow, and merged.