add RustBelt positions

Author: RalfJung

drafts/2019-11-26-this-week-in-rust.md

@@ -156,6 +156,8 @@ Email the [Rust Community Team][community] for access.
 
 # Rust Jobs
 
+* [PhD, postdoc & intern positions in RustBelt and Iris projects at Max Planck](https://users.rust-lang.org/t/jobs-phd-postdoc-intern-positions-in-rustbelt-and-iris-projects-at-max-planck/35016)
+
 *Tweet us at [@ThisWeekInRust](https://twitter.com/ThisWeekInRust) to get your job offers listed here!*
 
 # Quote of the Week