Fix pattern

Author: BrunoQuaresma

package.json

@@ -43,7 +43,7 @@
           "items": {
             "title": "SSH Config Value",
             "type": "string",
-            "pattern": "[a-zA-Z0-9-]+[=\\s].*$"
+            "pattern": "^[a-zA-Z0-9-]+[=\\s].*$"
           },
           "scope": "machine",
           "default": []