a bit of cleanup

tools/data_aquisition_by_hand.ipynb

@@ -3,7 +3,9 @@
   {
    "cell_type": "markdown",
    "id": "4abb1785-91d0-4c14-8b61-a04e2823a405",
-   "metadata": {},
+   "metadata": {
+    "jp-MarkdownHeadingCollapsed": true
+   },
    "source": [
     "# Aufnahme der Daten von Hand\n",
     "\n",
@@ -81,7 +83,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.10.12"
+   "version": "3.12.3"
   }
  },
  "nbformat": 4,