update default values in readme (#2094)

* update default values in readme

* docs: improve formatting

* docs: improve readme punctation

Co-authored-by: rickstaa <rick.staa@outlook.com>

src/cards/repo-card.js

@@ -88,7 +88,7 @@ const renderRepoCard = (repo, options = {}) => {
     icon_color,
     text_color,
     bg_color,
-    show_owner,
+    show_owner = false,
     theme = "default_repocard",
     border_radius,
     border_color,

src/cards/top-languages-card.js

@@ -235,7 +235,7 @@ const useLanguages = (topLangs, hide, langs_count) => {
  */
 const renderTopLanguages = (topLangs, options = {}) => {
   const {
-    hide_title,
+    hide_title = false,
     hide_border,
     card_width,
     title_color,