Update Appium.js

Fixed #4865
Enhancement: Prevent Double Slashes in Appium Endpoint URL
Overview:
This update improves the _buildAppiumEndpoint() function by ensuring the path does not end with a trailing slash. This prevents potential issues with double slashes when constructing the Appium REST API endpoint URL.

Changes:
Introduced normalizedPath, which removes a trailing slash from path using .replace(/\/$/, '').
Updated the return statement to use normalizedPath instead of path.
Benefits:
✅ Prevents malformed URLs with double slashes.
✅ Improves consistency and reliability of API requests.
✅ Enhances code readability and maintainability.

Author: mjalav

lib/helper/Appium.js

@@ -383,8 +383,10 @@ class Appium extends Webdriver {
 
   _buildAppiumEndpoint() {
     const { protocol, port, hostname, path } = this.browser.options
+    // Ensure path does NOT end with a slash to prevent double slashes
+    const normalizedPath = path.replace(/\/$/, '');
     // Build path to Appium REST API endpoint
-    return `${protocol}://${hostname}:${port}${path}/session/${this.browser.sessionId}`
+    return `${protocol}://${hostname}:${port}${normalizedPath}/session/${this.browser.sessionId}`
   }
 
   /**