Update some translations (#1)

src/i18n/en/translation.json

@@ -14,7 +14,7 @@
     "download-file-button-title": "Download signed PDF",
     "error-files-label": "Failed signing processes",
     "re-upload-file-button-title": "Upload again",
-    "upload-status-file-text": "({{fileSize}}) is currently uploading..."
+    "upload-status-file-text": "({{fileSize}}) is currently uploading and being processed..."
   },
   "welcome": {
     "headline": "Welcome to the official signature service of the TU Graz",