Radial menu instructions updated with new Troop/Gold donation icons (#2769)

## Description:

Updates the instructions Help Menu to update the ally radial menu
screenshot to show the new gold and troop donation icons, as well as
what they do. Related to #2708

<img width="1656" height="974" alt="image"
src="https://github.com/user-attachments/assets/365e0fe5-6854-4cac-8288-039a05cf4905"
/>


## Please complete the following:

- [x] I have added screenshots for all UI updates
- [x] I process any text displayed to the user through translateText()
and I've added it to the en.json file
- [x] I have added relevant tests to the test directory
- [x] I confirm I have thoroughly tested these changes and take full
responsibility for any bugs introduced

## Please put your Discord username so you can be contacted if a bug or
regression is found:

bijx

src/client/HelpModal.ts

@@ -435,6 +435,14 @@ export class HelpModal extends LitElement {
                 <div class="inline-block icon betray-icon"></div>
                 <span>${translateText("help_modal.ally_betray")}</span>
               </li>
+              <li class="mb-4">
+                <div class="inline-block icon donate-icon"></div>
+                <span>${translateText("help_modal.radial_donate_troops")}</span>
+              </li>
+              <li class="mb-4">
+                <div class="inline-block icon donate-gold-icon"></div>
+                <span>${translateText("help_modal.radial_donate_gold")}</span>
+              </li>
             </ul>
           </div>
         </div>