Updated links.

README.md

@@ -33,17 +33,17 @@ using the LUMC GitLab server and using Git for data analysis projects.
 
 | Time  | Subject                                                                                | Teacher           | Contents                  |
 | ----- | -----------------                                                                      | ----------------- | ------------------------- |
-| 09:00 | [Introduction](/uploads/39ae7660be00d966a0efa9c5c1de9848/introduction.pdf)             | Jeroen Laros      | Welcome, GitLab overview, SSH keys |
+| 09:00 | [Introduction](/uploads/8d5bda06500f9aaa7c117aa6f4738667/introduction.pdf)             | Jeroen Laros      | Welcome, GitLab overview, SSH keys |
 | 09:30 | [Practical](/uploads/61571e1506aab941a54a77bb35d4492d/introduction_handouts.pdf)       |                   |                           |
-| 09:45 | [Git basics](/uploads/afbf19acbf4fa40047ebfcae0bc9905a/basics.pdf)                     | Wibowo Arindrarto | Basic Git command line fu |
+| 09:45 | [Git basics](/uploads/64cbdb7bf44df64c39f79f51d10b73cd/basics.pdf)                     | Wibowo Arindrarto | Basic Git command line fu |
 | 10:30 | [Practical](/uploads/eb2e001db4f605a343e19d23d40e754f/basics_handouts.pdf)             |                   |                           |
 | 11:00 | Coffee                                                                                 |                   |                           |
-| 11:15 | [Git and remote repositories](/uploads/90759d1088fbcbbee8a50b717f1ddc21/remotes.pdf)   | Martijn Vermaat   | Sharing and collaborating via GitLab |
+| 11:15 | [Git and remote repositories](/uploads/e1239f626e6c32a6c0bd915a0dc716ad/remotes.pdf)   | Martijn Vermaat   | Sharing and collaborating via GitLab |
 | 12:00 | Lunch                                                                                  |                   |                           |
 | 13:00 | [Practical](/uploads/dff8ad1b0f947d5866acdcdc70f3d673/remotes_handouts.pdf)            |                   |                           |
 | 13:30 | [Data analysis](usecases/)                                                             | Szymon Kiełbasa   | More GitLab, Markdown, data analysis use case |
 | 14:30 | Break                                                                                  |                   |                           |
-| 14:45 | [Combining changes by merging](/uploads/5f5caa6b44b1d8ce2883b6b3f378e859/merging.pdf)  | Martijn Vermaat   | Commit graph, merging, resolving merge conflicts |
+| 14:45 | [Combining changes by merging](/uploads/8627b6a3fcdd655217b0ea56f0b93fd0/merging.pdf)  | Martijn Vermaat   | Commit graph, merging, resolving merge conflicts |
 | 15:30 | [Practical](/uploads/9455ef406dfeb0e3c365c015965cd899/merging_handouts.pdf)            |                   |                           |
 | 16:00 | Questions, closing                                                                     |                   |                           |