fix pbme with images

docs/pangeo/dask_introduction.ipynb

@@ -591,21 +591,16 @@
     "To use Dask Dashboard through jupyterlab extension on Pangeo EOSC FOSS4G infrastructure,\n",
     "you will just need too look at the html link you have for your jupyterlab, and Dask dashboard port number, as highlighted in the figure below.\n",
     "\n",
+    "![Dashboard link](../images/dashboardlink.png)\n",
     "\n",
-    "<img src=\"../images/dashboardlink.png\" width=\"50%\">\n",
-    "<img src=\"../images/dasklab.png\" width=\"30%\">\n",
+    "![Dask Lab](../images/dasklab.png)\n",
     "\n",
     "Then click the orange icon indicated in the above figure, and type 'your' dashboard link (normally, you just need to replace 'todaka' to 'your username').  \n",
     "\n",
-    "\n",
-    "\n",
-    "\n",
-    "\n",
-    "\n",
     "You can click several buttons indicated with blue arrows in above figures, then drag and drop to place them as your convenience.  \n",
     "\n",
     "\n",
-    "<img src=\"../images/exampledasklab.png\" width=\"50%\">\n",
+    "![Example Dask Lab](../images/exampledasklab.png)\n",
     "\n",
     "\n",
     "It's really helpfull to understand your computation and how it is distributed."