Add note to install a bash emulator on Windows (#25)

* Add note to install a bash emulator on Windows

So that they can run the final animation tutorial which assumes a bash prompt.

* Fix indentation in extended animation tutorial

book/intro.md

@@ -150,6 +150,13 @@ If you prefer to run the 🧑‍🏫 tutorials with a local installation of GMT/
 follow along! For this AGU24 workshop, we recommend creating a virtual conda environment
 and installing the C and 🐍 Python libraries inside.
 
+```{attention}
+If you are running this on Windows, we recommend installing a bash emulator (e.g.
+[Git for Windows](https://gitforwindows.org/)) so that you can run the command-line
+instructions below. A bash prompt is also a pre-requisite for the final
+[animation tutorial](./tut06_animation) that assumes a bash scripting environment.
+```
+
 :::{tip} For users comfortable with using `git`, feel free to ⬇️ download or clone the
 repository containing the workshop materials directly using
 `git clone https://github.com/GenericMappingTools/agu24workshop.git`

book/tut06_animation_extended.rst

@@ -66,15 +66,16 @@ In this step I plot a map of the earth with all the quakes from 2018.
     - I use :gmt-module:`makecpt` to create a `CPT <https://docs.generic-mapping-tools.org/6.5/reference/cpts.html#of-colors-and-color-legends>`_ to color the earthquakes.
     - I used the earthquakes from the file `quakes_2018.txt <https://github.com/GenericMappingTools/gmtserver-admin/blob/master/cache/quakes_2018.txt>`_ which has 5 columns.
 
-     ============== ========== ======== ================ ========================
-      Longitude      Latitude   Depth    Magnitude (x50)          Date
-     ============== ========== ======== ================ ========================
-      46.4223        -38.9126     10        260           2018-01-02T02:16:18.11
-      169.3488       -18.8355   242.77      260           2018-01-02T08:10:00.06
-      ...
-     ============== ========== ======== ================ ========================
+      ============== ========== ======== ================ ========================
+       Longitude      Latitude   Depth    Magnitude (x50)          Date
+      ============== ========== ======== ================ ========================
+       46.4223        -38.9126     10        260           2018-01-02T02:16:18.11
+       169.3488       -18.8355   242.77      260           2018-01-02T08:10:00.06
+       ...
+      ============== ========== ======== ================ ========================
+
     - Note that the input file has the columns sorted as will be required by the :gmt-module:`plot` and :gmt-module:`events` modules. It was also used for `animation 08 <https://docs.generic-mapping-tools.org/6.5//animations/anim08.html>`_.
-    Check it to see how it was downloaded and processed.
+      Check it to see how it was downloaded and processed.
 
 
 3.3. Make master frame