Merge branch 'rpi4' into 'master'

rpi4-osdev

See merge request codechina/mirrors-settings!443

projects/isometimes/imports.yml

+---
+group:
+  name: 'isometimes'
+  description: ''
+  projects:
+  - name: 'rpi4-osdev'
+    description: ''
+    mirrorRelease: false
+    topic: ''
+  
\ No newline at end of file