Bump bl from 1.2.2 to 1.2.3 in /example

Bumps [bl](https://github.com/rvagg/bl) from 1.2.2 to 1.2.3.
- [Release notes](https://github.com/rvagg/bl/releases)
- [Commits](rvagg/bl@v1.2.2...v1.2.3)

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

example/yarn.lock

@@ -706,9 +706,9 @@ binary-extensions@^2.0.0:
   integrity sha512-Phlt0plgpIIBOGTT/ehfFnbNlfsDEiqmzE2KRXoX1bLIlir4X/MR+zSyBEkL05ffWgnRSf/DXv+WrUAVr93/ow==
 
 bl@^1.0.0:
-  version "1.2.2"
-  resolved "https://registry.yarnpkg.com/bl/-/bl-1.2.2.tgz#a160911717103c07410cef63ef51b397c025af9c"
-  integrity sha512-e8tQYnZodmebYDWGH7KMRvtzKXaJHx3BbilrgZCfvyLUYdKpK1t5PSPmpkny/SgiTSCnjfLW7v5rlONXVFkQEA==
+  version "1.2.3"
+  resolved "https://registry.yarnpkg.com/bl/-/bl-1.2.3.tgz#1e8dd80142eac80d7158c9dccc047fb620e035e7"
+  integrity sha512-pvcNpa0UU69UT341rO6AYy4FVAIkUHuZXRIWbq+zHnsVcRzDDjIAhGuuYoi0d//cwIwtt4pkpKycWEfjdV+vww==
   dependencies:
     readable-stream "^2.3.5"
     safe-buffer "^5.1.1"