docs: update snapshot workflow doc (#6751)

CONTRIBUTING.md

@@ -4,9 +4,16 @@ We would love for you to contribute to **KoliBri**and help make it even better t
 
 - [Contributing](#contributing)
   - [Code of Conduct](#code-of-conduct)
-  - [Questions and Problems](#questions-and-problems)
-  - [Report bug](#report-bug)
+  - [Questions and problems](#questions-and-problems)
+  - [Report an error](#report-an-error)
   - [Further development](#further-development)
+    - [Git flow](#git-flow)
+    - [Developing](#developing)
+    - [Develop new component](#develop-new-component)
+    - [Switching between branches](#switching-between-branches)
+    - [Back porting to older Major-Versions](#back-porting-to-older-major-versions)
+    - [Snapshot Testing for Visual Changes](#snapshot-testing-for-visual-changes)
+      - [How to Update Snapshots](#how-to-update-snapshots)
 
 ## Code of Conduct
 
@@ -78,30 +85,32 @@ The simplest procedure is therefore to create a new branch from the release bran
 The Continuous Integration (CI) pipeline incorporates automated visual regression testing using the React sample app across all available themes.
 
 When introducing visual modifications to components, themes, or the React sample app, initial test failures are expected. To address this, the
-`update-snapshots` action on GitHub should be executed, followed by a **careful review** of the changes.
+`update-snapshots.yml` action on GitHub should be executed, followed by a **careful review** of the changes.
 
 #### How to Update Snapshots
 
-1. **GitHub website:**
-
-   - Execute the `update-snapshots` action on GitHub.
-   - The action prompts for a branch selection.
-   - It checks out the specified branch, updates all snapshot files, and commits the changes to that branch.
-
-2. **Terminal Command:**
-
-   - For terminal convenience, the [GitHub CLI (gh)](https://cli.github.com/) needs to be installed.
-   - Run the following command within the project directory:
-
-     ```bash
-     # Replace $YOUR_BRANCH with the desired branch name
-     gh workflow run update-snapshots.yml -f target_branch=$YOUR_BRANCH
-     ```
-
-     Alternatively, to run the action on the current branch:
-
-     ```bash
-     gh workflow run update-snapshots.yml -f target_branch=`git rev-parse --abbrev-ref HEAD`
-     ```
+The following methods can be used to update the snapshots.
+
+1. **GitHub website:** Update the snapshots directly on the GitHub website by following these steps.
+
+   - Navigate to the `Actions` tab in the `kolibri` repository.
+   - Execute the `03 - Update Snapshots` action.
+   - Select the desired branch in which you want to update the snapshots.
+   - The workflow checks out the branch, updates all snapshot files, and commits the changes to that branch.
+
+2. **Terminal Command:** Use the [GitHub CLI (gh)](https://cli.github.com/) to run the `update-snapshots.yml` action from the local terminal. This method is recommended for updating snapshots on the current branch without navigating to the GitHub website. For terminal convenience, the [GitHub CLI (gh)](https://cli.github.com/) needs to be installed.
+
+    - Run the following command within the project directory to update the snapshots in your checked-out branch:
+      ```bash
+      gh workflow run update-snapshots.yml -r `git rev-parse --abbrev-ref HEAD`
+      ```
+    - If your want to delete all snapshots before regenerating them add `-f purge_snapshots=true` to the command:
+      ```bash
+      gh workflow run update-snapshots.yml -r `git rev-parse --abbrev-ref HEAD` -f purge_snapshots=true
+      ```
+    - You can also run the action on a different branch by specifying the another target branch with the `-r <branch_name>` flag. For example, to update snapshots on the `main` branch:
+      ```bash
+      gh workflow run update-snapshots.yml -r main
+      ```
 
 These steps ensure that visual snapshots are updated systematically, maintaining the integrity of the testing process.