fix: update access token (#652)

Author: razvan

tests/templates/kuttl/mount-dags-gitsync/30-install-airflow-cluster.yaml.j2

@@ -30,9 +30,9 @@ type: Opaque
 data:
   # This is a fine-grained access token for the owner of the repo (stackable-airflow/dags) which has read only access
   # to *only* this repo. Contact github users @razvan or @adwk67 for details.
-  # It is valid for one year and will expire on 12.08.2025.
+  # This token doesn't expire.
   user: c3RhY2thYmxlLWFpcmZsb3c=
-  password: Z2l0aHViX3BhdF8xMUJLUURCRVkwSFFPMkpjRlJ1ekxLX0FLTGhqT0xvZ0JQMzZnTENFUFo0RUNETTM2TndjdTJDQUJvVVFueFBiVGhDTTZKQkhJNFFIZVdJb1dECg==
+  password: Z2l0aHViX3BhdF8xMUJLUURCRVkwSk1EWlNVQk1RYTdoX0c2OGlhbWtpRkpFV1RMTTF0ajFwbHFTVFNyZ3p3dHZneXI5b2tubGRXaGpVRDZITFRFV0JJcm9yT0dXCg==
 ---
 apiVersion: v1
 kind: ConfigMap