fix: removing process env to fix the build proccess

- this need to be refactored, to add a proper fix to show the correct version of the packeage

src/constants.ts

@@ -15,5 +15,5 @@ export const STORYBLOK_AGENT = 'SB-Agent'
 export const STORYBLOK_JS_CLIENT_AGENT = {
 	defaultAgentName: 'SB-JS-CLIENT',
 	defaultAgentVersion: 'SB-Agent-Version',
-	packageVersion: process.env.npm_package_version || '5.0.0',
+	packageVersion: '6.0.0',
 }