fix(i18n): add missing comma in lang JSON (broke artisan boot / Docker build)

A merge concatenated the inspection-versioning keys with later additions
without a comma after "Version history", making lang/en.json and pl.json
invalid JSON — which aborts package:discover and the production image build
(FileLoader: invalid JSON structure).

Author: jakubprzepiora-cyber

backend/lang/en.json

@@ -3029,7 +3029,7 @@
     "Save as new version": "Save as new version",
     "This is a draft — editable in place and not yet used for inspections.": "This is a draft — editable in place and not yet used for inspections.",
     "This version is published and immutable. Saving creates a new draft version — the published version stays unchanged so past inspections remain reproducible.": "This version is published and immutable. Saving creates a new draft version — the published version stays unchanged so past inspections remain reproducible.",
-    "Version history": "Version history"
+    "Version history": "Version history",
     "CLOSED": "CLOSED",
     "+ New Account": "+ New Account",
     "+ New Area": "+ New Area",

backend/lang/pl.json

@@ -3029,7 +3029,7 @@
     "Save as new version": "Zapisz jako nową wersję",
     "This is a draft — editable in place and not yet used for inspections.": "To szkic — edytowalny w miejscu i jeszcze nieużywany do inspekcji.",
     "This version is published and immutable. Saving creates a new draft version — the published version stays unchanged so past inspections remain reproducible.": "Ta wersja jest opublikowana i niezmienna. Zapis utworzy nową wersję-szkic — opublikowana wersja pozostaje bez zmian, aby przeszłe inspekcje były odtwarzalne.",
-    "Version history": "Historia wersji"
+    "Version history": "Historia wersji",
     "CLOSED": "ZAMKNIĘTE",
     "+ New Account": "+ Nowe konto",
     "+ New Area": "+ Nowy obszar",