Update README.md

fix typo in create learning path address that was causing 404

Author: BmanClark

README.md

@@ -12,7 +12,7 @@ The Learning Paths created here are maintained by Arm and the Arm software devel
 
 All contributions are welcome as long as they relate to software development for the Arm architecture. 
   * Write a Learning Path (or improve existing content)
-    * Fork this repo and submit pull requests; follow the step by step instructions in [Create a Learning Path](https://learn.arm.com//learning-paths/cross-platform/_example-learning-path/) on the website.
+    * Fork this repo and submit pull requests; follow the step by step instructions in [Create a Learning Path](https://learn.arm.com/learning-paths/cross-platform/_example-learning-path/) on the website.
   * Ideas for a new Learning Path
     * Create a new GitHub idea under the [Discussions](https://github.com/ArmDeveloperEcosystem/arm-learning-paths/discussions) area in this GitHub repo.
   * Log a code issue (or other general issues)