test: use .leaflet-marker-icon instead of .leaflet-container

ci tests can't find .leaflet-container node

cypress/e2e/example.cy.js

@@ -6,37 +6,37 @@ describe('Test open route services endpoint components', () => {
     //test directions
     cy.visit('/')
     cy.contains('h3', 'You’ve successfully created a project with')
-    cy.get('.leaflet-container')
+    cy.get('.leaflet-marker-icon').should('have.length', 4)
     cy.get('.ors_call').should('contain.text', 'routing')
     //test elevation
     cy.contains('button','Elevation').click()
-    cy.get('.leaflet-container')
+    cy.get('.leaflet-marker-icon').should('have.length', 2)
     cy.get('.ors_call').should('contain.text', 'geometry')
 
     //test geocode
     cy.contains('button','Geocode').click()
-    cy.get('.leaflet-container')
+    cy.get('.leaflet-marker-icon').should('have.length', 10)
     cy.get('.ors_call').should('contain.text', 'geocoding')
 
     //test Isochrones
     cy.contains('button','Isochrones').click()
-    cy.get('.leaflet-container')
+    cy.get('.leaflet-marker-icon').should('have.length', 3)
     cy.get('.ors_call').should('contain.text', 'isochrones')
 
     //test Matrix
     cy.contains('button','Matrix').click()
-    cy.get('.leaflet-container')
+    cy.get('.leaflet-marker-icon').should('have.length', 3)
     cy.get('.ors_call').should('contain.text', 'matrix')
 
     //test Optimization
     cy.contains('button','Optimization').click()
-    cy.get('.leaflet-container')
+    cy.get('.leaflet-marker-icon').should('have.length', 5)
     cy.get('.ors_call').should('contain.text', 'job')
     cy.get('.ors_call').should('contain.text', 'vehicle')
 
     //test Pois
     cy.contains('button','Pois').click()
-    cy.get('.leaflet-container')
+    cy.get('.leaflet-marker-icon').should('have.length', 33)
     cy.get('.ors_call').should('contain.text', 'pois')
   })
 })