Submission editting options to fix wrong address for rewards

### User Story

[comment]: # (As a , I want to so that .)

After submitting my work, there is no way to edit the submissions. As I user I want to be able to edit them, so that I can fix some mistakes like wrong reward address.

### Why Is this Needed

[comment]: # (Describe the problem and why this task is needed. Provide description of the current state, what you would like to happen, and what actually happen)
*Summary*: I submitted my work of [a challenge](https://gitcoin.co/issue/AcalaNetwork/polakdot-hello-world-acala/2/100023952) , but by mistake I used a KSM address, instead of DOT address to receive my reward. By there is no way I can edit my submission.

### Description

[comment]: # (Feature or Bug? i.e Type: Bug)
*Type*:

### Current Behavior
[comment]: # (Describe what actually happened.)

### Expected Behavior
[comment]: # (Describe what you expected to happen.)

### Definition of Done
[comment]: # (Any other information that would be useful, bullets are helpful.)

### Data Requirements
[comment]: # (How will we measure the success of this feature? What kind of tracking is needed for this feature (clicks, impressions, flag)?)

### Additional Information
[comment]: # (Any other information that would be useful, content, screenshots, etc.)

I'm grateful if anyone could help to do a quick fix of my address to receive reward in [this challenge](https://gitcoin.co/issue/AcalaNetwork/polakdot-hello-world-acala/2/100023952), it should be `15MU4F6KMprfJH4LHGHFzNLBAB1K6yUVyyFay2ukAuFkmXjg` (the DOT address), instead of `HZ2fAPXhWc4vwothfRjznDFnchQkqC1NkmdUXzcWwx39T4w` (the KSM address).