chore: Use check mark icon for replayed tasks (#298)

# Description

This PR implements the following changes:

- [x] Use check mark icon for replayed tasks

The minus icon is a bit unintuitive, and a user can view whether the
task was executed or replayed by expanding the task detail.

## Type of change

- [x] Refactor (non-breaking change that updates existing functionality)

## Test plan (required)

Run the app. See the checkmarks.

## Screenshots/Screencaps

<img width="240" alt="CleanShot 2023-09-06 at 13 42 21@2x"
src="https://github.com/ipvm-wg/homestar/assets/7957636/0a9cdc9f-27b0-40e9-b243-1bc35e626522">

examples/websocket-relay/relay-app/src/components/controls/Task.svelte

@@ -8,7 +8,6 @@
   import CheckCircleIcon from "$components/icons/CheckCircle.svelte";
   import ChevronDownIcon from "$components/icons/ChevronDown.svelte";
   import ChevronUpIcon from "$components/icons/ChevronUp.svelte";
-  import MinusCircleIcon from "$components/icons/MinusCircle.svelte";
   import XCircleIcon from "$components/icons/XCircle.svelte";
   import TaskValue from "$components/controls/TaskValue.svelte";
 
@@ -29,9 +28,7 @@
   <div class="flex flex-cols gap-2 items-center">
     {#if task.status === "waiting"}
       <CircleIcon />
-    {:else if task.status === "replayed"}
-      <MinusCircleIcon />
-    {:else if task.status === "executed"}
+    {:else if task.status === "executed" || task.status === "replayed"}
       <CheckCircleIcon />
     {:else if task.status === "failure"}
       <XCircleIcon />