github_app_access_token: fix compatibility import of jwt (#10810)

Fix compatibility import of jwt.

changelogs/fragments/10810-github_app_access_token-jwt.yml

@@ -0,0 +1,2 @@
+bugfixes:
+  - "github_app_access_token lookup plugin - fix compatibility imports for using jwt (https://github.com/ansible-collections/community.general/issues/10807, https://github.com/ansible-collections/community.general/pull/10810)."

plugins/lookup/github_app_access_token.py

@@ -77,7 +77,8 @@ except ImportError:
 HAS_PYTHON_JWT = False  # vs pyjwt
 if HAS_JWT and hasattr(jwt, 'JWT'):
     HAS_PYTHON_JWT = True
-    from jwt import jwk_from_pem, jwt_instance
+    from jwt import jwk_from_pem, JWT
+    jwt_instance = JWT()
 
 try:
     from cryptography.hazmat.primitives import serialization