Fixed Grammatical Errors in Community Theme Descriptions (#1376)

* Fixed grammatical error in theme-data.js

In the Flatlogic description, the phrase "how real applications is built" is grammatically incorrect since "applications" is a plural noun but "is" refers to a singular noun. I changed it to "how real applications are built."

In the PrimeVue description, the phrase "look&feel" (which lacked spaces between the words and punctuation) has been changed to "look & feel".

* Update theme-data.js

In the Flatlogic description, "Check the admin dashboard templates" has been changed to "Check out the admin dashboard templates."

Author: seafoamteal

src/.vuepress/components/community/themes/theme-data.js

@@ -127,7 +127,7 @@ export default [
   },
   {
     name: 'PrimeVue',
-    description: `The open-source UI component library [PrimeVue](https://www.primefaces.org/primevue/#/?af_id=4218) offers over 80 flexible components to build your apps with! They have a ton of different component themes and Vue-CLI application templates available to get the look&feel that suits you best.`,
+    description: `The open-source UI component library [PrimeVue](https://www.primefaces.org/primevue/#/?af_id=4218) offers over 80 flexible components to build your apps with! They have a ton of different component themes and Vue-CLI application templates available to get the look & feel that suits you best.`,
     seeMoreUrl: 'https://www.primefaces.org/primevue/#/?af_id=4218',
     products: [
       {
@@ -218,7 +218,7 @@ export default [
   },
   {
     name: 'Flatlogic',
-    description: `Check the admin dashboards templates built by our partners from [Flatlogic](https://flatlogic.com/templates?ref=x-fdkuTAVW). With these themes you can see how real applications is built. Additionally these templates will help you to start a new application and save you time and money.`,
+    description: `Check out the admin dashboard templates built by our partners from [Flatlogic](https://flatlogic.com/templates?ref=x-fdkuTAVW). With these themes you can see how real applications are built. Additionally, these templates will help you to start a new application and save you time and money.`,
     seeMoreUrl: 'https://flatlogic.com/templates?ref=x-fdkuTAVW',
     products: [
       {