Update ghcr.io/getporter/porter-agent Docker tag to v1.1.1

This MR contains the following updates:

Package	Type	Update	Change
ghcr.io/getporter/porter-agent		patch	v1.1.0 -> v1.1.1
ghcr.io/getporter/porter-agent	ironbank-docker	patch	v1.1.0 -> v1.1.1

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