build: used 20.04 for travis

Aerex · Aerex · commit 66e8380d553d · 2023-11-13T13:18:35.000-06:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,5 +1,5 @@
 language: go
-dist: mantic
+dist: focal
 go:
 - '1.21.x'
 addons:
