(docs) RTD does not embed imagemagick which is needed for automatic svg > pdf conversion (readthedocs/readthedocs.org#3979). Added path to svg image as alternative link instead

Author: erwanp

docs/dev/architecture.rst

@@ -5,7 +5,8 @@ Architecture
 
 The RADIS modules are organized with the following flow chart
 
-.. image:: RADIS_flow_chart.svg
+.. image:: RADIS_flow_chart.*
+    :alt: https://radis.readthedocs.io/en/latest/_images/RADIS_flow_chart.svg
 
 -------------------------------------------------------------------------
 

docs/features.rst

@@ -21,8 +21,8 @@ and refer to the :ref:`Configuration file <label_lbl_config_file>` on how to use
 See the comparison of two CO2 spectra calculated with [HITEMP-2010]_ and [CDSD-4000]_ 
 below:
 
-.. image:: spectrum/cdsd4000_vs_hitemp_3409K.svg
-    :alt: Figure CO2 CDSD-4000 vs HITEMP-2010
+.. image:: spectrum/cdsd4000_vs_hitemp_3409K.*
+    :alt: https://radis.readthedocs.io/en/latest/_images/cdsd4000_vs_hitemp_3409K.svg
 
 
 Performance

docs/spectrum/howto.rst

@@ -484,8 +484,8 @@ In :func:`~radis.spectrum.compare.plot_diff`, you can choose to plot the absolut
     from radis import plot_diff
     plot_diff(s_cdsd, s_hitemp, method=['diff', 'ratio']) 
 
-.. image:: ./cdsd4000_vs_hitemp_3409K.svg
-    :alt: Figure CO2 CDSD-4000 vs HITEMP-2010
+.. image:: ./cdsd4000_vs_hitemp_3409K.*
+    :alt: https://radis.readthedocs.io/en/latest/_images/cdsd4000_vs_hitemp_3409K.svg