[patch] Add missing github_pat to params

[durera]

Fixes regression created by #1149

TASK [ibm.mas_fvt.setup_pipeline : Update Devops Tasks (ibm-mas-tekton)] *******
FAILED - RETRYING: [localhost]: Update Devops Tasks (ibm-mas-tekton) (10 retries left).
FAILED - RETRYING: [localhost]: Update Devops Tasks (ibm-mas-tekton) (9 retries left).
FAILED - RETRYING: [localhost]: Update Devops Tasks (ibm-mas-tekton) (8 retries left).
FAILED - RETRYING: [localhost]: Update Devops Tasks (ibm-mas-tekton) (7 retries left).
FAILED - RETRYING: [localhost]: Update Devops Tasks (ibm-mas-tekton) (6 retries left).
FAILED - RETRYING: [localhost]: Update Devops Tasks (ibm-mas-tekton) (5 retries left).
FAILED - RETRYING: [localhost]: Update Devops Tasks (ibm-mas-tekton) (4 retries left).
FAILED - RETRYING: [localhost]: Update Devops Tasks (ibm-mas-tekton) (3 retries left).
FAILED - RETRYING: [localhost]: Update Devops Tasks (ibm-mas-tekton) (2 retries left).
FAILED - RETRYING: [localhost]: Update Devops Tasks (ibm-mas-tekton) (1 retries left).
fatal: [localhost]: FAILED! => {"attempts": 10, "changed": false, "msg": "Failed to create object: b'{\"kind\":\"Status\",\"apiVersion\":\"v1\",\"metadata\":{},\"status\":\"Failure\",\"message\":\"admission webhook \\\\\"validation.webhook.pipeline.tekton.dev\\\\\" denied the request: validation failed: non-existent variable in \\\\\"$(params.github_pat)\\\\\": spec.tasks[3].params[github_pat]\",\"reason\":\"BadRequest\",\"code\":400}\\n'", "reason": "Bad Request"}