Tweak format of NB05 header.

Author: jeffcarlin

05_Intro_to_Source_Detection.ipynb

@@ -4,7 +4,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "<img align=\"left\" src = https://project.lsst.org/sites/default/files/Rubin-O-Logo_0.png width=250> \n",
+    "<img align=\"left\" src = https://project.lsst.org/sites/default/files/Rubin-O-Logo_0.png width=250 style=\"padding: 10px\"> \n",
     "<b>Introduction to Source Detection</b> <br>\n",
     "Last verified to run on <b>2021-06-10</b> with LSST Science Pipelines release <b>w_2021_20</b> <br>\n",
     "Contact author: Alex Drlica-Wagner <br>\n",