Bump js-base64 from 2.5.2 to 2.6.2 (#14237)

Bumps [js-base64](https://github.com/dankogai/js-base64) from 2.5.2 to 2.6.2.
- [Release notes](https://github.com/dankogai/js-base64/releases)
- [Commits](https://github.com/dankogai/js-base64/compare/2.5.2...2.6.2)

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

yarn.lock

@@ -6893,9 +6893,9 @@ jest@^26.0.1:
     jest-cli "^26.0.1"
 
 js-base64@^2.1.9:
-  version "2.5.2"
-  resolved "https://registry.yarnpkg.com/js-base64/-/js-base64-2.5.2.tgz#313b6274dda718f714d00b3330bbae6e38e90209"
-  integrity sha512-Vg8czh0Q7sFBSUMWWArX/miJeBWYBPpdU/3M/DKSaekLMqrqVPaedp+5mZhie/r0lgrcaYBfwXatEew6gwgiQQ==
+  version "2.6.2"
+  resolved "https://registry.yarnpkg.com/js-base64/-/js-base64-2.6.2.tgz#cf9301bc5cc756892a9a6c8d7138322e5944fb0d"
+  integrity sha512-1hgLrLIrmCgZG+ID3VoLNLOSwjGnoZa8tyrUdEteMeIzsT6PH7PMLyUvbDwzNE56P3PNxyvuIOx4Uh2E5rzQIw==
 
 js-string-escape@1.0.1:
   version "1.0.1"