chore: fix some typos in comments (#3108)

Signed-off-by: loselarry <bikangning@yeah.net>

frontend/src/utils/upload.ts

@@ -35,7 +35,7 @@ export function scanFiles(dt: DataTransfer): Promise<UploadList | FileList> {
     const contents: UploadList = [];
 
     if (dt.items) {
-      // ts didnt like the for of loop even tho
+      // ts didn't like the for of loop even tho
       // it is the official example on MDN
       // for (const item of dt.items) {
       for (let i = 0; i < dt.items.length; i++) {