[IMP] *: use svg icons instead of png

Prior to this commit, some icons used the png version.
After this commit, the svg version is used instead.

task-2818586

Part-of: odoo/odoo#116641

odoo/modules/module.py

@@ -37,7 +37,7 @@ _DEFAULT_MANIFEST = {
     'depends': [],
     'description': '',
     'external_dependencies': {},
-    #icon: f'/{module}/static/description/icon.png',  # automatic
+    #icon: f'/{module}/static/description/icon.svg',  # automatic
     'init_xml': [],
     'installable': True,
     'images': [],  # website
@@ -240,7 +240,7 @@ def get_resource_from_path(path):
     return None
 
 def get_module_icon(module):
-    iconpath = ['static', 'description', 'icon.png']
+    iconpath = ['static', 'description', 'icon.svg']
     if get_module_resource(module, *iconpath):
         return ('/' + module + '/') + '/'.join(iconpath)
     return '/base/'  + '/'.join(iconpath)