Release 1.1.0 rc2

[jdolitsky]

Candidate commits for releasing 1.1.0-rc2 and switch back to dev and bump main branch version to 1.1.0-dev

(See https://github.com/opencontainers/distribution-spec/pull/348 for process)

19 PRs merged since last release (v1.1.0-rc1):

git log --oneline --merges 1dfa4f4...270cc7f | sed '$ d' |  \
  sed 's/.*Merge pull request //' | grep -v 'GHSA' | awk '{print "- " $1}' | uniq | grep '#'

• 401

• 395

• 400

• 394

• 399

• 366

• 383

• 393

• 391

• 392

• 387

• 385

• 384

• 380

• 379

• 381

• 371

• 356

• 348

[jdolitsky]

duplicate of #403