Enhance README.md to improve clarity and formatting of timestamp dataflow in super-admin-all-sites-menu plugin

Author: soderlind

README.md

@@ -115,10 +115,10 @@ A demo is available in [WordPress Playground](https://playground.wordpress.net/?
 
 Let me break down the dataflow related to the timestamp in the super-admin-all-sites-menu plugin:
 
-1. Initial Timestamp Creation:
+1. **Initial Timestamp Creation**:
    - In super-admin-all-sites-menu.php, a timestamp is generated when the plugin initializes
    - This is exposed via the `get_timestamp()` method of the main plugin class
-2. PHP to JavaScript Transfer:
+2. **PHP to JavaScript Transfer**:
    - The timestamp is passed to JavaScript via `wp_add_inline_script()` in super-admin-all-sites-menu.php around line 409:
    ```php
    wp_add_inline_script( 'super-admin-all-sites-menu', "const pluginAllSitesMenu = {$data};", 'before' );
@@ -130,7 +130,7 @@ Let me break down the dataflow related to the timestamp in the super-admin-all-s
    // other data...
    ]);
    ```
-3. JavaScript Storage Check:
+3. **JavaScript Storage Check**:
    - In index.js, the `populateDB()` function compares timestamps:
    ```javascript
    if (
@@ -141,7 +141,7 @@ Let me break down the dataflow related to the timestamp in the super-admin-all-s
    	await db.delete();
    }
    ```
-4. Database Population:
+4. **Database Population**:
    - If the IndexedDB is empty or was deleted due to timestamp mismatch:
    ```javascript
    if ((await db.count()) === 0) {
@@ -151,7 +151,7 @@ Let me break down the dataflow related to the timestamp in the super-admin-all-s
    	});
    }
    ```
-5. Timestamp Update Triggers:
+5. **Timestamp Update Triggers**:
    - The timestamp is updated when:
      - A site is added/deleted from the network
      - A plugin that affects the menu is activated/deactivated