change notebook title

Author: drbenvincent

docs/source/notebooks/graded_intervention_time_series_single_channel_ols.ipynb

@@ -4,7 +4,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "# Graded Intervention Time Series (OLS)\n",
+    "# Graded Intervention Time Series: Introduction\n",
     "\n",
     "**Graded Intervention Time Series** extends classical interrupted time series analysis to handle **graded interventions** - policies or treatments with varying intensity over time, rather than simple on/off changes. Traditional ITS methods model binary interventions (e.g., \"policy enacted\" vs \"no policy\"). This method (technically called Transfer Function Interrupted Time Series or TF-ITS in the literature {cite:p}`box1975intervention`, with extensions to multiple time series by {cite:p}`abraham1980intervention`) handles more realistic scenarios where:\n",
     "\n",