Update BButton snapshot

spec/frontend/content_editor/components/__snapshots__/toolbar_button_spec.js.snap

 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
 exports[`content_editor/components/toolbar_button displays tertiary, small button with a provided label and icon 1`] = `
-"<b-button-stub event=\\"click\\" routertag=\\"a\\" size=\\"sm\\" variant=\\"default\\" type=\\"button\\" tag=\\"button\\" aria-label=\\"Bold\\" title=\\"Bold\\" class=\\"gl-mx-2 gl-button btn-default-tertiary btn-icon\\">
+"<b-button-stub size=\\"sm\\" variant=\\"default\\" type=\\"button\\" tag=\\"button\\" aria-label=\\"Bold\\" title=\\"Bold\\" class=\\"gl-mx-2 gl-button btn-default-tertiary btn-icon\\">
   <!---->
   <gl-icon-stub name=\\"bold\\" size=\\"16\\" class=\\"gl-button-icon\\"></gl-icon-stub>
   <!---->