fix typo in unit 1

Author: jmelsbach

unit1/01_introduction_to_diffusers.ipynb

@@ -692,7 +692,7 @@
     "q(\\mathbf{x}_{1:T} \\vert \\mathbf{x}_0) = \\prod^T_{t=1} q(\\mathbf{x}_t \\vert \\mathbf{x}_{t-1})$<br><br>\n",
     "\n",
     "\n",
-    "That is, we take $x_{t-1}$, scale it by $\\sqrt{1 - \\beta_t}$ and add noise scaled by $\\beta_t$. This $\\beta$ is defined for every t accoridng to some schedule, and determines how much noise is added per timestep. Now, we don't necessariy want to do this operation 500 times to get $x_{500}$ so we have another formula to get $x_t$ for any t given $x_0$: <br><br>\n",
+    "That is, we take $x_{t-1}$, scale it by $\\sqrt{1 - \\beta_t}$ and add noise scaled by $\\beta_t$. This $\\beta$ is defined for every t according to some schedule, and determines how much noise is added per timestep. Now, we don't necessariy want to do this operation 500 times to get $x_{500}$ so we have another formula to get $x_t$ for any t given $x_0$: <br><br>\n",
     "\n",
     "$\\begin{aligned}\n",
     "q(\\mathbf{x}_t \\vert \\mathbf{x}_0) &= \\mathcal{N}(\\mathbf{x}_t; \\sqrt{\\bar{\\alpha}_t} \\mathbf{x}_0, {(1 - \\bar{\\alpha}_t)} \\mathbf{I})\n",