Run gopls modernize on codebase (#34751)

Recent modernize fixes:
https://github.com/golang/tools/commits/master/gopls/internal/analysis/modernize

services/lfs/server.go

@@ -11,6 +11,7 @@ import (
 	"errors"
 	"fmt"
 	"io"
+	"maps"
 	"net/http"
 	"net/url"
 	"path"
@@ -480,9 +481,7 @@ func buildObjectResponse(rc *requestContext, pointer lfs_module.Pointer, downloa
 			rep.Actions["upload"] = &lfs_module.Link{Href: rc.UploadLink(pointer), Header: header}
 
 			verifyHeader := make(map[string]string)
-			for key, value := range header {
-				verifyHeader[key] = value
-			}
+			maps.Copy(verifyHeader, header)
 
 			// This is only needed to workaround https://github.com/git-lfs/git-lfs/issues/3662
 			verifyHeader["Accept"] = lfs_module.AcceptHeader