Add package: write for ghcr.io permission

[peterdeme]

Description of the change

Fixing this issue:

#16 [auth] spacelift-io/runner-ansible:pull,push token for ghcr.io
#16 DONE 0.0s

#14 exporting to image
#14 pushing layers 0.8s done
#14 ERROR: unexpected status: 403 Forbidden
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 > exporting to image:
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ERROR: failed to solve: unexpected status: 403 Forbidden
Error: buildx failed with: ERROR: failed to solve: unexpected status: 403 Forbidden

Type of change

• Bug fix (non-breaking change that fixes an issue);
• New feature (non-breaking change that adds functionality);
• Breaking change (fix or feature that would cause existing functionality not to work as expected);
• Other (miscellaneous, GitHub workflow changes, changes to the PR template);

Checklists

Development

• Parts of this pull request impacting core (user-facing, documented) product functionality have test coverage;

Code review

• This pull request has a descriptive title and sufficient context for a reviewer. There may be a screenshot or screencast attached;
• This pull request is no longer a draft;
• You have reviewed this Pull Request yourself;