Bump matrix from 0.4.2 to 0.4.3

Bumps [matrix](https://github.com/ruby/matrix) from 0.4.2 to 0.4.3.
- [Release notes](https://github.com/ruby/matrix/releases)
- [Changelog](https://github.com/ruby/matrix/blob/master/CHANGELOG.md)
- [Commits](https://github.com/ruby/matrix/compare/v0.4.2...v0.4.3)

---
updated-dependencies:
- dependency-name: matrix
  dependency-version: 0.4.3
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Gemfile.lock

@@ -776,7 +776,7 @@ GEM
       net-smtp
     marcel (1.0.4)
     markly (0.13.0)
-    matrix (0.4.2)
+    matrix (0.4.3)
     messagebird-rest (1.4.2)
     meta-tags (2.22.1)
       actionpack (>= 6.0.0, < 8.1)
@@ -1758,7 +1758,7 @@ CHECKSUMS
   mail (2.8.1) sha256=ec3b9fadcf2b3755c78785cb17bc9a0ca9ee9857108a64b6f5cfc9c0b5bfc9ad
   marcel (1.0.4) sha256=0d5649feb64b8f19f3d3468b96c680bae9746335d02194270287868a661516a4
   markly (0.13.0) sha256=326a232c876cd95093d110b8d184be8effeadd776c3ffcefd59bdc8de7f59e0d
-  matrix (0.4.2) sha256=71083ccbd67a14a43bfa78d3e4dc0f4b503b9cc18e5b4b1d686dc0f9ef7c4cc0
+  matrix (0.4.3) sha256=a0d5ab7ddcc1973ff690ab361b67f359acbb16958d1dc072b8b956a286564c5b
   md_to_pdf (0.2.1)
   messagebird-rest (1.4.2) sha256=1501e16ad76c87558f20f3b26cb39d05f587b349b44b8bf8056b040e9b495301
   meta-tags (2.22.1) sha256=e5ae1febbd320d396c7226d7edb868e5d63466c14b9c8b06622a1a74e6dce354