fixed a typo in double-schechter notebook

Author: pranav-satheesh

notebooks/devs/sams/double-schechter.ipynb

@@ -146,7 +146,7 @@
     "print(f\"{'logmstar':>10s} : c2 = $ -0.033 \\pm 0.015$\")\n",
     "# directly from the paper:\n",
     "print(f\"{'alpha1':>10s} : a1 = $ -0.28 \\pm 0.07$\")\n",
-    "print(f\"{'alpha2':>10s} : a1 = $ -1.48 \\pm 0.015$\")   # +0.01, -0.02"
+    "print(f\"{'alpha2':>10s} : a2 = $ -1.48 \\pm 0.015$\")   # +0.01, -0.02"
    ]
   },
   {