Sync files from galaxyproject/training-material (#4157)

- Update CONTRIBUTORS.yaml
- Update ORGANISATIONS.yaml
- Update GRANTS.yaml
- Update schema-contributors.yaml
- Update schema-grants.yaml
- Update schema-organisations.yaml

Co-authored-by: bgruening <469983+bgruening@users.noreply.github.com>

Author: galaxy-hub-bot[bot]

content/CONTRIBUTORS.yaml

@@ -223,6 +223,11 @@ alliecreason:
     orcid: 0000-0001-5724-1276
     joined: 2023-02
 
+allissadillman:
+    name: Allissa Dillman
+    email: adillman@biodatasage.com
+    joined: 2026-05
+
 almahmoud:
     name: Alex Mahmoud
     joined: 2019-06