refactor: add missing translation

src/app/shared/components/about-dialog/about-dialog.component.ts

@@ -8,7 +8,7 @@ import { MAT_DIALOG_DATA } from '@angular/material/dialog';
             <img src="./assets/icons/icon-tv-256.png" width="128" /><br />
             <h2 mat-dialog-title>{{ 'ABOUT.TITLE' | translate }}</h2>
             <p>{{ 'ABOUT.DESCRIPTION' | translate }}</p>
-            <p>Version: {{ appVersion }}</p>
+            <p>{{ 'ABOUT.VERSION' | translate }}: {{ appVersion }}</p>
             <p>
                 <a
                     href="https://github.com/4gray/iptvnator"
@@ -56,5 +56,5 @@ import { MAT_DIALOG_DATA } from '@angular/material/dialog';
     ],
 })
 export class AboutDialogComponent {
-    constructor(@Inject(MAT_DIALOG_DATA) private appVersion: string) {}
+    constructor(@Inject(MAT_DIALOG_DATA) public appVersion: string) {}
 }

src/assets/i18n/en.json

@@ -147,6 +147,7 @@
     },
     "ABOUT": {
         "TITLE": "About IPTVnator",
-        "DESCRIPTION": "Cross-platform IPTV player application with multiple features, such as support of m3u and m3u8 playlists, favorites, TV guide, TV archive/catchup and more."
+        "DESCRIPTION": "Cross-platform IPTV player application with multiple features, such as support of m3u and m3u8 playlists, favorites, TV guide, TV archive/catchup and more.",
+        "VERSION": "Version"
     }
 }