fixed typo (#243)

* fixed copy-paste typo

* Update ch07/01_main-chapter-code/ch07.ipynb

* Update ch07/01_main-chapter-code/ch07.ipynb

* Update ch07/01_main-chapter-code/ch07.ipynb

* Update ch07/01_main-chapter-code/ch07.ipynb

---------

Co-authored-by: Sebastian Raschka <mail@sebastianraschka.com>

ch07/01_main-chapter-code/ch07.ipynb

@@ -1763,7 +1763,7 @@
     "| Model              | Device                | Runtime for 2 Epochs |\n",
     "|--------------------|-----------------------|----------------------|\n",
     "| gpt2-medium (355M) | CPU (M3 MacBook Air)  | 15.78 minutes        |\n",
-    "| gpt2-small (124M)  | GPU (M3 MacBook Air)  | 10.77 minutes        |\n",
+    "| gpt2-medium (355M) | GPU (M3 MacBook Air)  | 10.77 minutes        |\n",
     "| gpt2-medium (355M) | GPU (L4)              | 1.83 minutes         |\n",
     "| gpt2-medium (355M) | GPU (A100)            | 0.86 minutes         |\n",
     "| gpt2-small (124M)  | CPU (M3 MacBook Air)  | 5.74 minutes         |\n",
@@ -2740,7 +2740,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.11.4"
+   "version": "3.10.11"
   }
  },
  "nbformat": 4,