Add myself to rust highfive (#390)

Author: fee1-dead

highfive/configs/rust-lang/rust.json

@@ -15,7 +15,8 @@
         "compiler-team-contributors": [
             "@jackh726",
             "@cjgillot",
-            "@compiler-errors"
+            "@compiler-errors",
+            "@fee1-dead"
         ],
         "compiler": [
             "compiler-team",