Use v2 image tag to force K8s to pull updated image

K8s caches :latest tag. Using :v2 ensures the permission-fixed
image is pulled instead of the cached old one.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

main.nf

@@ -8,7 +8,7 @@ params.msa_server = 'https://api.colabfold.com'
 params.num_samples = 5
 
 process CHAI1 {
-    container 'harbor.cluster.omic.ai/omic/chai1:latest'
+    container 'harbor.cluster.omic.ai/omic/chai1:v2'
     publishDir params.outdir, mode: 'copy'
     stageInMode 'copy'
     maxForks 1