*: replace nxt -> monogon

These are hopefully the last leftovers from the nxt monorepo.

This change breaks existing build containers and IntelliJ setups, and
unfortunately thrashes developer workstation Bazel caches.

Running `scripts/bin/destroy_container.sh &&
scripts/bin/create_container.sh` and then following the IntelliJ setup
guide in //README.md should be enough to fix everything.

Did that locally and was able to set up a fully working IntelliJ
IDE against this change.

Change-Id: I090f4e4f2ea03998569a4ea3d1aa4cd4ec570f8a
Reviewed-on: https://review.monogon.dev/c/monogon/+/61
Reviewed-by: Leopold Schabel <leo@nexantic.com>
diff --git a/build/fietsje/shelf.go b/build/fietsje/shelf.go
index ea709be..99a06c5 100644
--- a/build/fietsje/shelf.go
+++ b/build/fietsje/shelf.go
@@ -32,7 +32,7 @@
 // The Shelf is a combined cache and dependency lockfile, not unlike go.sum. It's implemented as a text proto file on
 // disk, and currently stores a single mapping of shelfKeys to shelfValues, which are in order a (importpath, version)
 // tuple and the `locked` structure of a dependency.
-// The resulting shelf file should be commited to the nxt repository. It can be freely deleted to force recreation from
+// The resulting shelf file should be commited to the monogon repository. It can be freely deleted to force recreation from
 // scratch, which can be useful as there is no garbage collection implemented for it.
 // The 'lockfile' aspect of the Shelf is counter-intuitive to what readers might be used to from other dependency
 // management systems. It does not lock a third-party dependency to a particular version, but only locks a well defined