Update functions image version

* fix migration copy script bash syntax

Author: luqman-visualt

charts/supabase/README.md

@@ -187,10 +187,10 @@ To make copying scripts easier, use this handy bash script:
 ```bash
 #!/bin/bash
 
-clipboard="\n"
 for file in $1/*; do
   clipboard+="    $(basename $file): |\n"
   clipboard+=$(cat $file | awk '{print "      "$0}')
+  clipboard+="\n"
 done
 
 echo -e "$clipboard"

charts/supabase/values.example.yaml

@@ -216,4 +216,4 @@ vector:
 
 functions:
   image:
-    tag: v1.18.1
+    tag: v1.20.2