Update BroadcastChannel name in globalApi.ts (#353)

# PR Checklist
- [ ] Did you check if it works normally in all models? *ignore this
when it dosen't uses models*
- [ ] Did you check if it works normally in all of web, local and node
hosted versions? if it dosen't, did you blocked it in those versions?
- [ ] Did you added a type def?

# Description

src/ts/storage/globalApi.ts

@@ -261,7 +261,10 @@ export async function saveDb(){
     })
     let gotChannel = false
     const sessionID = v4()
-    const channel = BroadcastChannel ? (new BroadcastChannel('risu-active')): null
+    let channel:BroadcastChannel
+    if(BroadcastChannel){
+        channel = new BroadcastChannel('risu-db')
+    }
     if(channel){
         channel.onmessage = async (ev) => {
             if(ev.data === sessionID){