H2: Fix links

exercises/h2.md

@@ -310,15 +310,15 @@ sudo apt-get install lynx libimage-exiftool-perl fakeroot
 
 **Example runtime screenshots of each program:**
 
-1. [!lynx_img](https://github.com/Fincer/linux_server_setup/blob/master/images/h2-lynx.png)
+1. ![lynx_img](https://github.com/Fincer/linux_server_setup/blob/master/images/h2-lynx.png)
 
   - Lynx (https://www.hs.fi - front page)
 
-2. [!exiftool_img](https://github.com/Fincer/linux_server_setup/blob/master/images/h2-exiftool.png)
+2. ![exiftool_img](https://github.com/Fincer/linux_server_setup/blob/master/images/h2-exiftool.png)
 
   - Exiftool (examined CR2 file metadata)
 
-3. [!fakeroot_img](https://github.com/Fincer/linux_server_setup/blob/master/images/h2-fakeroot.png)
+3. ![fakeroot_img](https://github.com/Fincer/linux_server_setup/blob/master/images/h2-fakeroot.png)
 
   - fakeroot (asked who am i, accessed fakeroot environment, created a new file in fakeroot environment and asked who am i again. It is claimed that the current user is root although this is not true, as can be seen when exiting the fakeroot environment)