update checkpoint definition

resources/01-docker/docs/ch1-discover-docker-td.md

 # Discover Docker
 
 !!! check   
-    Checkpoint: call us to check your results (don’t stay blocked on a checkpoint if we are busy, we can check ⅔ checkpoints at the same time)  
+    Checkpoint: do a commit and call us to check your results (don’t stay blocked on a checkpoint if we are busy, we can check ⅔ checkpoints at the same time)  
 
 !!! question  
     Point to document/report  

resources/01-docker/docs/ch1-discover-docker-tp.md

 # Discover Docker
 
 !!! check  
-    Checkpoint: call us to check your results (don’t stay blocked on a checkpoint if we are busy, we can check ⅔ checkpoints at the same time). 
+    Checkpoint: do a commit and call us to check your results (don’t stay blocked on a checkpoint if we are busy, we can check ⅔ checkpoints at the same time). 
 
 !!! question  
     Point to document/report.

resources/02-github-actions/docs/ch2-discover-github-actions-td.md

 # Discover Github 
 
 !!! note  
-    Checkpoint: call us to check your results (don’t stay blocked on a checkpoint if we are busy, we can check ⅔ checkpoints at the same time)  
+    Checkpoint: do a commit and call us to check your results (don’t stay blocked on a checkpoint if we are busy, we can check ⅔ checkpoints at the same time)  
 
 !!! question  
     Point to document/report  

resources/02-github-actions/docs/ch2-discover-github-actions-tp.md

 # Discover Github Action
 
 !!! check  
-    Checkpoint: call us to check your results (don’t stay blocked on a checkpoint if we are busy, we can check ⅔ checkpoints at the same time)  
+    Checkpoint: do a commit and call us to check your results (don’t stay blocked on a checkpoint if we are busy, we can check ⅔ checkpoints at the same time)  
 
 !!! question  
     Point to document/report  

resources/03-ansible/docs/ch3-discover-ansible-td.md

 # Discover Ansible
 
 !!! note  
-    Checkpoint: call us to check your results (don’t stay blocked on a checkpoint if we are busy, we can check ⅔ checkpoints at the same time)  
+    Checkpoint: do a commit and call us to check your results (don’t stay blocked on a checkpoint if we are busy, we can check ⅔ checkpoints at the same time)  
 
 !!! question  
     Point to document/report  

resources/03-ansible/docs/ch3-discover-ansible-tp.md

 # Discover Ansible
 
 !!! check  
-    Checkpoint: call us to check your results (don’t stay blocked on a checkpoint if we are busy, we can check ⅔ checkpoints at the same time)  
+    Checkpoint: do a commit and call us to check your results (don’t stay blocked on a checkpoint if we are busy, we can check ⅔ checkpoints at the same time)  
 
 !!! question  
     Point to document/report