Update src/chains/index.ts

Co-authored-by: jxom  <jakemoxey@gmail.com>

src/chains/index.ts

@@ -108,6 +108,8 @@ export { filecoinCalibration } from './definitions/filecoinCalibration.js'
 export { filecoinHyperspace } from './definitions/filecoinHyperspace.js'
 export { flare } from './definitions/flare.js'
 export { flareTestnet } from './definitions/flareTestnet.js'
+/** @deprecated Use 
+export { flowPreviewnet } from './definitions/flowPreviewnet.js'
 export { flowMainnet } from './definitions/flowMainnet.js'
 export { flowTestnet } from './definitions/flowTestnet.js'
 export { forma } from './definitions/forma.js'