Update manifest.json

Author: ChristophCaina

custom_components/sureha/manifest.json

@@ -3,7 +3,7 @@
     "name": "SureHA",
     "version": "0.4.6",
     "documentation": "https://github.com/ChristophCaina/sureha",
-    "issue_tracker": https://github.com/ChristophCaina/sureha/issues",
+    "issue_tracker": "https://github.com/ChristophCaina/sureha/issues",
     "config_flow": true,
     "codeowners": ["@benleb"],
     "requirements": ["surepy>=0.9.0"],