Add key prop inside map (#867)

* fix: add unique key to list items in TestingVersionList component

* fix: add unique key to PluginCard components in BrowseTab

frontend/src/components/settings/pages/testing/index.tsx

@@ -80,7 +80,7 @@ export default function TestingVersionList() {
         <ul style={{ listStyleType: 'none', padding: '0' }}>
           {testingVersions.map((version) => {
             return (
-              <li>
+              <li key={`${version.id}_${version.name}`}>
                 <Field
                   label={
                     <>

frontend/src/components/store/Store.tsx

@@ -240,6 +240,7 @@ const BrowseTab: FC<{ setPluginCount: Dispatch<SetStateAction<number | null>> }>
             })
             .map((plugin: StorePlugin) => (
               <PluginCard
+                key={`${plugin.id}_${plugin.name}`}
                 storePlugin={plugin}
                 installedPlugin={installedPlugins.find((installedPlugin) => installedPlugin.name === plugin.name)}
               />