Update post message

Author: yaswant

.github/workflows/cla-check.yaml

@@ -202,7 +202,7 @@ jobs:
               await deleteOldClaComments();
 
               // Post CLA comment
-              const commentBody = `Hello @${author}! 👋\n\nThank you for your contribution. Since this is your first time contributing to this repository, we ask that you sign our Contributor Licence Agreement (CLA).\n\n📄 [You can read the CLA here](https://github.com/MetOffice/Momentum/blob/main/CLA.md).\n\nTo agree to the CLA, please add your details (**GitHub username**, real name, organisation, email, and date) to the _CONTRIBUTORS.md_ file (create one, if required) in the development branch for this PR. After signing the CLA, you won't need to do this again for future PRs.`;
+              const commentBody = `Hello @${author}! 👋\n\nThank you for your contribution. Since this is your first time contributing to this repository, we ask that you sign our Contributor Licence Agreement (CLA).\n\n📄 [You can read the CLA here](https://github.com/MetOffice/Momentum/blob/main/CLA.md).\n\nTo agree to the CLA, please add your details (**GitHub username**, Real Name, Affiliation, and Date) to the _CONTRIBUTORS.md_ file (create one, if required) in the development branch for this PR. After signing the CLA, you won't need to do this again for future PRs.`;
 
               await github.rest.issues.createComment({ owner, repo, issue_number, body: commentBody });