fix: restore valid json syntax in pyrightconfig.json

Signed-off-by: Luca Muscariello <muscariello@ieee.org>

Author: muscariello

pyrightconfig.json

@@ -1,6 +1,5 @@
 {
-    "ignore": [
-        "src/a2a/types"
-    ],
-    "venvPath": ".",
-    "venv": ".venv"
+  "ignore": ["src/a2a/types"],
+  "venvPath": ".",
+  "venv": ".venv"
+}