test: rename multi-instance shortcut test to describe exact behaviour

Agent-Logs-Url: https://github.com/codex-team/editor.js/sessions/1188405a-9b5c-490f-a89f-5613434f0858

Co-authored-by: neSpecc <3684889+neSpecc@users.noreply.github.com>

Author: Copilot

test/cypress/tests/ui/InlineToolbar.cy.ts

@@ -176,7 +176,7 @@ describe('Inline Toolbar', () => {
   });
 
   describe('Shortcuts', () => {
-    it('should work when multiple editor instances are present on the same page', () => {
+    it('should activate the focused editor\'s tool when shortcut is pressed with multiple instances on the page', () => {
       const toolActivated1 = cy.stub().as('toolActivated1');
       const toolActivated2 = cy.stub().as('toolActivated2');