[FIX] project: translate measure label in burndown chart graph view

Before this commit, Project >  '# of tasks' from the burndown chart was not
translatable to any language

So in this commit, Project >  '# of tasks' from the burndown chart will be
translatable to any language

task-3010685

X-original-commit: 1593436ac4ebbb121d3dc0a9725c74f3d7f0ad39
Part-of: odoo/odoo#103978

addons/project/i18n/project.pot

@@ -52,8 +52,11 @@ msgid "# Tasks"
 msgstr ""
 
 #. module: project
+#. openerp-web
+#: code:addons/project/static/src/views/burndown_chart/burndown_chart_model.js:0
 #: model:ir.model.fields,field_description:project.field_project_milestone__task_count
 #: model:ir.model.fields,field_description:project.field_report_project_task_user__nbr
+#, python-format
 msgid "# of Tasks"
 msgstr ""
 

addons/project/static/src/views/burndown_chart/burndown_chart_model.js

@@ -8,7 +8,7 @@ export class BurndownChartModel extends GraphModel {
      * @override
      */
     async _loadDataPoints(metaData) {
-        metaData.measures.__count.string = '# of Tasks';
+        metaData.measures.__count.string = this.env._t('# of Tasks');
         return super._loadDataPoints(metaData);
     }
 }