Bump @sphereon/ssi-types from 0.26.0 to 0.31.0 in /packages/credentials

Bumps [@sphereon/ssi-types](https://github.com/Sphereon-OpenSource/ssi-sdk) from 0.26.0 to 0.31.0.
- [Release notes](https://github.com/Sphereon-OpenSource/ssi-sdk/releases)
- [Changelog](https://github.com/Sphereon-Opensource/SSI-SDK/blob/v0.31.0/CHANGELOG.md)
- [Commits](Sphereon-Opensource/SSI-SDK@v0.26.0...v0.31.0)

---
updated-dependencies:
- dependency-name: "@sphereon/ssi-types"
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

packages/credentials/package.json

@@ -85,7 +85,7 @@
   "devDependencies": {
     "@playwright/test": "1.45.3",
     "@sphereon/pex-models": "2.2.4",
-    "@sphereon/ssi-types": "0.26.0",
+    "@sphereon/ssi-types": "0.31.0",
     "@types/chai": "4.3.16",
     "@types/eslint": "8.56.10",
     "@types/mocha": "10.0.6",