Mm 16623 fix all initialism errors in channels/app and channels/api4 dir (#25743)

* updated go mod and sum files

* fixed var-naming errors in channels/app and channels/api4 dir

* Revert "updated go mod and sum files"

This reverts commit 088dd00a848c2c31952c29f0a2a28a9fb47fc3f7.

* renamed a cost .

server/channels/app/slashcommands/auto_posts.go

@@ -79,7 +79,7 @@ func (cfg *AutoPostCreator) CreateRandomPost(c request.CTX) (*model.Post, error)
 	return cfg.CreateRandomPostNested(c, "")
 }
 
-func (cfg *AutoPostCreator) CreateRandomPostNested(c request.CTX, rootId string) (*model.Post, error) {
+func (cfg *AutoPostCreator) CreateRandomPostNested(c request.CTX, rootID string) (*model.Post, error) {
 	var fileIDs []string
 	if cfg.HasImage {
 		var err error
@@ -99,7 +99,7 @@ func (cfg *AutoPostCreator) CreateRandomPostNested(c request.CTX, rootId string)
 	post := &model.Post{
 		ChannelId: cfg.channelid,
 		UserId:    cfg.userid,
-		RootId:    rootId,
+		RootId:    rootID,
 		Message:   postText,
 		FileIds:   fileIDs,
 	}