Update slides/list.json

2020/2020-02-15_gnuLinuxCourse/slides/list.json

@@ -2,6 +2,7 @@
     { "filename": "index.md" },
     { "filename" : "intro_first.md"},
     { "filename" : "intro_beforewebegin.md"},
+    { "filename" : "intro_aim.md"},
     { "filename": "overview.md" },
     { "filename": "shell_intro.md" }
 ]