Fix app/assets/javascripts/vue_shared/components/expand_collapse_button/expand_collapse_button.stories.js

FAIL  app/assets/javascripts/vue_shared/components/expand_collapse_button/expand_collapse_button.stories.js (9.493 s)
  ● vue_shared/expand_collapse_button › MultipleSections › smoke-test
    assert.fail(received, expected)
    Message:
      Found 1 accessibility violations: 
    -----------------------------------
    Expected the HTML found at $('button[aria-label="Collapse "]') to have no violations:
    <button aria-label="Collapse " aria-expanded="true" aria-controls="section2-content" type="button" class="-gl-mr-2 gl-ml-3 !gl-p-0 btn gl-button btn-default btn-sm btn-default-tertiary">
    
    Received:
    ARIA attributes must conform to valid values (aria-valid-attr-value)
    
    Fix all of the following:
      Invalid ARIA attribute value: aria-controls="section2-content"
    
    You can find more information on this issue here: 
    https://dequeuniversity.com/rules/axe/4.10/aria-valid-attr-value?application=axeAPI
    -----------------------------------
      at TerminalReporterV2.<anonymous> (storybook/node_modules/axe-playwright/dist/reporter/terminalReporterV2.js:64:34)
      at storybook/node_modules/axe-playwright/dist/reporter/terminalReporterV2.js:8:71
      at Object.<anonymous>.__awaiter (storybook/node_modules/axe-playwright/dist/reporter/terminalReporterV2.js:4:12)
      at TerminalReporterV2.report (storybook/node_modules/axe-playwright/dist/reporter/terminalReporterV2.js:22:16)
      at storybook/node_modules/axe-playwright/dist/index.js:97:20
      at storybook/node_modules/axe-playwright/dist/index.js:31:71
      at Object.<anonymous>.__awaiter (storybook/node_modules/axe-playwright/dist/index.js:27:12)
      at reportViolations (storybook/node_modules/axe-playwright/dist/index.js:96:52)
      at storybook/node_modules/axe-playwright/dist/index.js:141:44
      at fulfilled (storybook/node_modules/axe-playwright/dist/index.js:28:58)