fix(core): Forward headers option to sentry-cli (#797)

Author: liAmirali

packages/bundler-plugin-core/src/build-plugin-manager.ts

@@ -100,6 +100,7 @@ function createCliInstance(options: NormalizedOptions): SentryCli {
     vcsRemote: options.release.vcsRemote,
     headers: {
       ...getTraceData(),
+      ...options.headers,
     },
   });
 }