fixed Colab link in PatchTST tutorial nb

Author: oguiza

tutorial_nbs/15_PatchTST_a_new_transformer_for_LTSF.ipynb

@@ -5,7 +5,7 @@
    "id": "892a35dd",
    "metadata": {},
    "source": [
-    "<a href=\"https://colab.research.google.com/github/timeseriesAI/tsai/blob/master/tutorial_nbs/15_PatchTST_a_new_transformer_for_long_term_multivariate_forecasting.ipynb\" target=\"_parent\"><img src=\"https://colab.research.google.com/assets/colab-badge.svg\" alt=\"Open In Colab\"/></a>"
+    "<a href=\"https://colab.research.google.com/github/timeseriesAI/tsai/blob/master/tutorial_nbs/15_PatchTST_a_new_transformer_for_LTSF.ipynb\" target=\"_parent\"><img src=\"https://colab.research.google.com/assets/colab-badge.svg\" alt=\"Open In Colab\"/></a>"
    ]
   },
   {
@@ -51,7 +51,7 @@
     }
    },
    "cell_type": "markdown",
-   "id": "f9cddb27",
+   "id": "411a935d",
    "metadata": {},
    "source": [
     "![download.png](attachment:download.png)"
@@ -1307,7 +1307,7 @@
     }
    },
    "cell_type": "markdown",
-   "id": "be46d87b",
+   "id": "ab3c17d2",
    "metadata": {},
    "source": [
     "We'll approach the time series forecasting task as a supervised learning problem. Remember that `tsai` requires that both inputs and outputs have the following shape: \n",
@@ -1322,7 +1322,7 @@
     }
    },
    "cell_type": "markdown",
-   "id": "eba72560",
+   "id": "22cf3c01",
    "metadata": {},
    "source": [
     "To get those inputs and outputs we're going to use a function called `prepare_forecasting_data` that applies a sliding window along the dataframe:\n",