[deps] Update openwisp-sphinx-theme requirement from ~=1.0.1 to ~=1.0.2

Updates the requirements on openwisp-sphinx-theme to permit the latest version.

---
updated-dependencies:
- dependency-name: openwisp-sphinx-theme
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Federico Capoano <[email protected]>

requirements.txt

@@ -5,5 +5,5 @@ svglib
 rst2pdf
 sphinxcontrib-jquery
 sphinx-notfound-page
-openwisp-sphinx-theme~=1.0.1
+openwisp-sphinx-theme~=1.0.2
 openwisp-utils[qa] @ https://github.com/openwisp/openwisp-utils/tarball/master