*: git.monogon.dev -> source.monogon.dev

This implements T882, setting our (virtual) GOPATH to source.monogon.dev
for this repository.

Test Plan: Refactor, CI only.

X-Origin-Diff: phab/D686
GitOrigin-RevId: c5e2309089948ffc3a98e68e2e0e1cbb157d3a36
diff --git a/metropolis/pkg/logtree/journal_entry.go b/metropolis/pkg/logtree/journal_entry.go
index 2a60aa1..d81b687 100644
--- a/metropolis/pkg/logtree/journal_entry.go
+++ b/metropolis/pkg/logtree/journal_entry.go
@@ -16,7 +16,7 @@
 
 package logtree
 
-import "git.monogon.dev/source/nexantic.git/metropolis/pkg/logbuffer"
+import "source.monogon.dev/metropolis/pkg/logbuffer"
 
 // entry is a journal entry, representing a single log event (encompassed in a Payload) at a given DN.
 // See the journal struct for more information about the global/local linked lists.