Merge branch 'master' into alternate

* master:
  feat(www): add unbird feedback component to starter lib (gatsbyjs#10450)
  fix(blog): youfit case study typofix
  Doc improvements to Visual testing with Storybook guide (gatsbyjs#10436)
  fix(gatsby-plugin-offline): prevent incorrect revisioning of static file by workbox (gatsbyjs#10416)
  fix(starters): ttag repo link
  fix typo in pull request template (gatsbyjs#10454)
  fix(www) Fix query for plugin links always ?=undefined (gatsbyjs#10453)
  chore(release): Publish
  fix(gatsby): fix extracting StaticQuery nested in shorthand fragment (gatsbyjs#10443)

Author: wconnorwalsh