fixing lots of broken links and a few typos

docs/governance/README.md

docs/logentry/processing-log-lines.md

docs/loki/api.md

docs/loki/operations.md

docs/loki/storage.md

docs/promtail.md

docs/promtail/api.md

docs/promtail/config-examples.md

docs/promtail/configuration.md

docs/promtail/deployment-methods.md