rename file

Signed-off-by: Meredith Lancaster <malancas@github.com>

__tests__/artifactMetadata.test.ts

@@ -1,5 +1,5 @@
 import {MockAgent, setGlobalDispatcher} from 'undici'
-import {createStorageRecord} from '../src/artifact-metadata'
+import {createStorageRecord} from '../src/artifactMetadata'
 
 describe('createStorageRecord', () => {
   const originalEnv = process.env

src/index.ts

@@ -1,3 +1,4 @@
+export {createStorageRecord} from '.artifactMetadata'
 export {AttestOptions, attest} from './attest'
 export {
   AttestProvenanceOptions,