How to these use R libraries to write and save a 'some_content' string into a field of an existing SQL table object?

Question

How to these use R libraries to write and save a 'some_content' string into a field of an existing SQL table object?

I want to insert a 'some_content' string into the field barplot inside the blog_blogpost object in SQL. How to proceed?

library(DBI)
library(RSQLite)
library(tidyverse)

con <- DBI::dbConnect(RSQLite::SQLite(), dbname = 'db.sqlite3')

DBI::dbListTables(con)

 [1] "account_emailaddress"          "account_emailconfirmation"     "auth_group"                    "auth_group_permissions"       
 [5] "auth_permission"               "auth_user"                     "auth_user_groups"              "auth_user_user_permissions"   
 [9] "blog_blogpost"                 "django_admin_log"              "django_content_type"           "django_migrations"            
[13] "django_session"                "django_site"                   "searches_searchquery"          "socialaccount_socialaccount"  
[17] "socialaccount_socialapp"       "socialaccount_socialapp_sites" "socialaccount_socialtoken"     "sqlite_sequence"   


DBI::dbListFields(con, "blog_blogpost")

 [1] "id"              "content"         "title"           "slug"            "user_id"         "timestamp"       "updated"        
 [8] "publish_date"    "image"           "barplot"         "summ_bert"       "article"         "maltego_csv"     "rainette_explor"
[15] "video_url"       "pdfs"            "wordcloud"