Fix typos

doc/maintainers.rst

@@ -21,7 +21,7 @@ result to the creation of the following folders in the path
 
 .. code-block::
 
-    <PROPOSAL_PATH>/scratch
+    <PROPOSAL_PATH>/scratch/
     ├─ checkouts/
     │  ├─ toolbox_<PROPOSAL>/
     │  │  ├─ <source code>
@@ -72,7 +72,7 @@ run the following commands:
 
 .. code:: shell
 
-    cd <PROPOSAL_PATH>/scratch
+    cd <PROPOSAL_PATH>/scratch/
     source envs/toolbox_<IDENTIFIER>/bin/activate
     pip install ...