Update new_release_team.md

Chevrons (< >) for Placeholders, permalink instructions, and example:

Chevrons are a widely understood convention for placeholders, improving readability and making it easier to spot text that needs replacement.

Detailed instructions  for generating a permalink to a line number in distribution.yml file, which evolves over time.

Example facilitates the correct format.

.github/ISSUE_TEMPLATE/new_release_team.md

@@ -25,3 +25,33 @@ title: 'Add release team'
 * Team members
   * [@FIRST_MAINTAINER_GITHUB_USERNAME](LINK TO SOURCE PACKAGE.XML MAINTAINER/AUTHOR TAG)
   * ...
+
+### Example of Proper Formatting
+```
+* [ament_cmake](https://github.com/ament/ament_cmake.git)
+    * [ros/rolling source entry](https://github.com/ros/rosdistro/blob/0d66d7f62975229ed0b1031137f8324ee568cc3e/rolling/distribution.yaml#L149)
+```
+
+### Instructions for Filling This Template
+1. **Repository Name and Source URL**:  
+   - Replace `<YOUR_REPOSITORY_NAME>` with the name of your repository.  
+   - Replace `<YOUR_REPOSITORY_SOURCE_URL>` with the link to your source repository.
+
+2. **Adding a Permalink to the Source Field**:  
+   - Navigate to the appropriate `distribution.yml` file for your ROS distribution (e.g., `humble/distribution.yaml`).  
+   - Find the "source" entry corresponding to your repository.  
+   - Click the **line number** to the left of the entry.  
+   - A menu will appear. Select **"Copy Permalink"** to generate a stable link to that line.
+
+3. **Replace `<LINK_TO_LINE_NUMBER_OF_SOURCE_FIELD>`**:  
+   - Paste the copied permalink into the placeholder.
+
+### Final Template Example
+* [franka_description](https://github.com/frankaemika/franka_description.git)
+    * [ros/humble source entry](https://github.com/ros/rosdistro/blob/0d66d7f62975229ed0b1031137f8324ee568cc3e/humble/distribution.yaml#L230)
+
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+