Add new team for push access to model transparency. (#454)

Add @spencerschrock to the new team as he starts working on this area.

There is one TODO to replace the team ID. That one I don't get until
after this lands and GitHub creates the team.

Signed-off-by: Mihai Maruseac <mihaimaruseac@google.com>

github-sync/github-data/sigstore/repositories.yaml

@@ -961,6 +961,9 @@ repositories:
       - name: model-transparency-codeowners
         id: 9730895
         permission: admin
+      - name: model-transparency
+        id: 9730895  # TODO: update with the new team ID once team is created
+        permission: push
     branchesProtection:
       - pattern: main
         enforceAdmins: true

github-sync/github-data/sigstore/teams.yaml

@@ -53,6 +53,9 @@ teams:
   - name: model-transparency-codeowners
     privacy: closed
     description: "Code owners for ML model transparency"
+  - name: model-transparency
+    privacy: closed
+    description: "Write access for ML model transparency"
   - name: policy-controller-codeowners
     privacy: closed
     description: Codeowners for sigstore/policy-controller

github-sync/github-data/sigstore/users.yaml

@@ -475,6 +475,11 @@ users:
     teams:
       - name: model-transparency-codeowners
         role: member
+  - username: spencerschrock
+    role: member
+    teams:
+      - name: model-transparency
+        role: member
   - username: steiza
     role: member
     teams: