Accessibility issue with Accordion keyboard navigation

[ltaylor2607]

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CodeSandbox Case (Bug Reports)
https://codesandbox.io/s/accordion-accessibility-issue-wcxxi?file=/src/App.vue

Current behavior
When using the keyboard to navigate through the accordion, it is not possible to open the accordion tab using the enter key.

Expected behavior
Pressing the enter key on an accordion tab should open the tab and display the content.

Minimal reproduction of the problem with instructions
A simple reproduction can be found on CodeSandbox at https://codesandbox.io/s/accordion-accessibility-issue-wcxxi?file=/src/App.vue
Navigate through the accordion using the keyboard and attempt to use enter to open the accordion tab

What is the motivation / use case for changing the behavior?
For accessibility purposes, it should be possible to navigate through an accordion using only the keyboard.

Please tell us about your environment:

• Operating system: Windows 10 Business
• IDE: Visual Studio Code
• *Package manager: npm
• Server: server provided by vue-cli-server
• Vue version: 3.1.2
• PrimeVue version: 3.5.1
• Browser: Microsoft edge 94.0.992.31 | Firefox 91.0.2 | Chrome 94.0.4606.61