fix: apply bobthecow's builtin instead of sed

functions/fish_prompt.fish

@@ -853,7 +853,7 @@ function __bobthefish_prompt_golang -S -a real_pwd -d 'Display current Go inform
     set -l d $real_pwd
     while not [ -z "$d" ]
         if [ -e $d/go.mod ]
-            grep "^go " "$d/go.mod" | sed 's/\r//' | read __ gomod_version
+            string match -rq '^go\s(?<gomod_version>\S+)' < "$d/go.mod"
             break
         end