ci: fix base64 decode command for macOS 13

For some reason macOS 13's base64 command doesn't seem to like the
long-form --decode option.

Signed-off-by: Jacob Howard <[email protected]>

Author: xenoscopic

scripts/ci/build.sh

@@ -30,7 +30,7 @@ if [[ "${MUTAGEN_OS_NAME}" == "darwin" ]]; then
         # Import the macOS code signing certificate and private key and allow access
         # from the codesign utility.
         MUTAGEN_CERTIFICATE_AND_KEY_PATH="${RUNNER_TEMP}/certificate_and_key.p12"
-        echo -n "${MACOS_CODESIGN_CERTIFICATE_AND_KEY}" | base64 --decode --output "${MUTAGEN_CERTIFICATE_AND_KEY_PATH}"
+        echo -n "${MACOS_CODESIGN_CERTIFICATE_AND_KEY}" | base64 -d -o "${MUTAGEN_CERTIFICATE_AND_KEY_PATH}"
         security import "${MUTAGEN_CERTIFICATE_AND_KEY_PATH}" -k "${MUTAGEN_KEYCHAIN_PATH}" -P "${MACOS_CODESIGN_CERTIFICATE_AND_KEY_PASSWORD}" -T "/usr/bin/codesign"
         rm "${MUTAGEN_CERTIFICATE_AND_KEY_PATH}"
         security set-key-partition-list -S apple-tool:,apple: -s -k "${MUTAGEN_KEYCHAIN_PASSWORD}" "${MUTAGEN_KEYCHAIN_PATH}" > /dev/null