chore(gen-semconv-ts): update to use prettier for formatting (open-telemetry#3298)

Author: trentm

scripts/gen-semconv-ts.js

@@ -231,8 +231,10 @@ ${chunks.join('\n\n')}
   );
   console.log(`Generated "${semconvTsPath}".`);
 
-  console.log('Running "npx eslint --fix src/semconv.ts" to fix formatting.');
-  execSync('npx eslint --fix src/semconv.ts', { cwd: wsDir });
+  console.log(
+    'Running "npx prettier --write src/semconv.ts" to fix formatting.'
+  );
+  execSync('npx prettier --write src/semconv.ts', { cwd: wsDir });
 }
 
 // mainline