Fix some linter warnings and deprecations · innogames/slack-bot@301811a

Unexpected input(s) 'stable', valid inputs are ['go-version', 'go-version-file', 'check-latest', 'token', 'cache', 'cache-dependency-path', 'architecture']

Restore cache failed: Dependencies file is not found in D:\a\slack-bot\slack-bot. Supported file pattern: go.sum

Unexpected input(s) 'stable', valid inputs are ['go-version', 'go-version-file', 'check-latest', 'token', 'cache', 'cache-dependency-path', 'architecture']