Release process: fix broken link

wiki/src/contribute/release_process.mdwn

@@ -17,7 +17,7 @@ To release Tails you'll need some packages installed:
 * aufs DKMS module for your running kernel.
 * [[!debpts squashfs-tools]] 1:4.4-1+0.tails1
   from our custom `iukbuilder-stretch` APT suite.
-* `iuk` [[dependencies|contribute/release_process/iuk]]
+* `iuk` [[dependencies|contribute/release_process/tails-iuk]]
 * `perl5lib` [[dependencies|contribute/release_process/perl5lib]]
 * `po4a` _from Stretch_: the version in testing/sid extracts Markdown headings
    in a different way, which makes tons of strings fuzzy.