PMM-7 ignore failing snyk actions (#2858)

* PMM-7 ignore failing snyk actions

This will temporarily configure merge-gatekeeper to ignore failing snyk actions until we have a vendor fix.

A relevant [ticket](https://percona.atlassian.net/servicedesk/customer/portal/2/HD-22815) has been raised with IT.

* PMM-7 update snyk action names

.github/workflows/main.yml

@@ -133,7 +133,7 @@ jobs:
           token: ${{ secrets.GITHUB_TOKEN }}
           interval: 45
           timeout: 1200
-          ignored: "WhiteSource License Check, WhiteSource Security Check"
+          ignored: "license/snyk (Percona Github Org), security/snyk (Percona Github Org)"
           ref: ${{ github.event.pull_request.head.sha || github.sha }}
 
   workflow_success: