Bump @einfach-produktiv/invoicing for the Vorkasse invoice fix

Fixes isPaidImmediately() incorrectly showing "Bereits beglichen" on
unpaid Überweisung (Vorkasse) invoices after the payment-methods rename
earlier today, plus adds the missing "please transfer to this account,
processed after payment received" instruction text.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

package-lock.json

@@ -455,8 +455,8 @@
       }
     },
     "node_modules/@einfach-produktiv/invoicing": {
-      "version": "0.2.2",
-      "resolved": "git+https://git.mk360.de/Marco/einfach-produktiv-invoicing.git#ceaa437724dae1adfd582ca209300d2ee0a10e68",
+      "version": "0.2.3",
+      "resolved": "git+https://git.mk360.de/Marco/einfach-produktiv-invoicing.git#8dc56c9783186d91cce5c659dc8fa77e673e9324",
       "dependencies": {
         "@e-invoice-eu/core": "^3.1.1"
       },