Lengthen timeout on a sometimes slow test (#4978)

services/wordpress/wordpress-version-color.spec.js

@@ -18,6 +18,8 @@ describe('toSemver() function', function() {
 
 describe('versionColorForWordpressVersion()', function() {
   it('generates correct colours for given versions', async function() {
+    this.timeout(5e3)
+
     expect(await versionColorForWordpressVersion('11.2.0')).to.equal(
       'brightgreen'
     )