fix not loading next page results in my jam tracks

jam-ui/src/store/features/myJamTracksSlice.js

@@ -42,7 +42,7 @@ export const myJamTracksSlice = createSlice({
       .addCase(fetchMyJamTracks.fulfilled, (state, action) => {
         state.status = 'succeeded';
         state.jamTracks = action.payload.jamtracks;
-        
+        state.next = action.payload.next; 
         //--- amend the state to include only unique jamTracks
         // const records = new Set([...state.jamTracks, ...action.payload.jamtracks]);
         // const unique = [];