Fix images of submission doc

week1/00-grading-and-submission.md

@@ -16,7 +16,7 @@ result online (under the *CI/CD > Pipeline* section of your personal gitlab
 repository) and check if your code compiles and runs properly on the grading
 environment.
 
-![images/pipeline-tab.png]
+![](images/pipeline-tab.png)
 
 The grading pipeline contains two steps:
   * *compile*: your code does not compile for grading if the job fail.
@@ -25,9 +25,9 @@ The grading pipeline contains two steps:
 
 You can click on the jobs to see the logs:
 
-![images/pipeline-details.png]
+![](images/pipeline-details.png)
 
-![images/pipeline-logs.png]
+![](images/pipeline-logs.png)
 
 ## Committing and pushing your code