fix: typo in build-curriculum.js (#42533)

tools/scripts/build/build-curriculum.js

@@ -6,7 +6,7 @@ const { getChallengesForLang } = require('../../../curriculum/getChallenges');
 const globalConfigPath = path.resolve(__dirname, '../../../config');
 
 // We are defaulting to English because the ids for the challenges are same
-// accross all languages.
+// across all languages.
 getChallengesForLang('english')
   .then(JSON.stringify)
   .then(x => fs.writeFileSync(`${globalConfigPath}/curriculum.json`, x));