composer update(deps): bump the single-pr group with 2 updates (#186)

Bumps the single-pr group with 2 updates: drupal/islandora and drupal/islandora_iiif.


Updates `drupal/islandora` from 2.13.1 to 2.13.2

Updates `drupal/islandora_iiif` from 2.13.1 to 2.13.2

---
updated-dependencies:
- dependency-name: drupal/islandora
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: single-pr
- dependency-name: drupal/islandora_iiif
  dependency-type: indirect
  update-type: version-update:semver-patch
  dependency-group: single-pr
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>