Scope down by removing ceritfications, linking specialized training direct to request for services

data/training.yml

+tracks:
+  - name: New to Git?
+    desc: here is a description
+    tag: git
+  - name: New to GitLab?
+    desc: here is a description
+    tag: gitlab
+  - name: Learn about GitLab CI/CD
+    desc: here is a description
+    tag: ci-cd
+  - name: GitLab Administration
+    desc: here is a description
+    tag: admin
 on_demand:
   - name: Git Newbies
     id: git