add -n to echo command

Author: lukqw

ephemeral/shutdown/action.yml

@@ -27,7 +27,7 @@ runs:
       run: |
         prId=$(<pr-id.txt)
         repoName=$GITHUB_REPOSITORY
-        repoNameCleaned=$(echo "$repoName" | tr -c '[:alnum:]\n' '-')
+        repoNameCleaned=$(echo -n "$repoName" | tr -c '[:alnum:]' '-')
         previewName=preview-$repoNameCleaned-$prId
         echo "previewName=$previewName" >> $GITHUB_ENV
 

ephemeral/startup/action.yml

@@ -60,7 +60,7 @@ runs:
       run: |
         prId=$(<pr-id.txt)
         repoName=$GITHUB_REPOSITORY
-        repoNameCleaned=$(echo "$repoName" | tr -c '[:alnum:]\n' '-')
+        repoNameCleaned=$(echo -n "$repoName" | tr -c '[:alnum:]' '-')
         previewName=preview-$repoNameCleaned-$prId
         echo "previewName=$previewName" >> $GITHUB_ENV