chore: update interpolation syntax for i18n files (#10198)

There were two warnings showing up on new teams page

1. `errorMessage` prop was getting invalid value, this was because were
short circuting the error message using `&&`, fixed it by using ternary
operator
2. `vue-i18n` has deprecated [rails
syntax](https://vue-i18n.intlify.dev/guide/essentials/syntax#rails-i18n-format),
fixed that warning by removing `%` before `{}` for interpolation

> Note: the `vue-i18n` deprecation needs to be handled, but we can do it
later

app/javascript/dashboard/i18n/locale/pl/helpCenter.json

@@ -84,7 +84,7 @@
     },
     "ARTICLE_SEARCH_RESULT": {
       "UNCATEGORIZED": "Bez kategorii",
-      "SEARCH_RESULTS": "Search results for %{query}",
+      "SEARCH_RESULTS": "Search results for {query}",
       "EMPTY_TEXT": "Search for articles to insert into replies.",
       "SEARCH_LOADER": "Wyszukiwanie...",
       "INSERT_ARTICLE": "Wstaw",