Bump lodash from 4.17.20 to 4.17.21 in /packages/docs

Bumps [lodash](https://github.com/lodash/lodash) from 4.17.20 to 4.17.21.
- [Release notes](https://github.com/lodash/lodash/releases)
- [Commits](lodash/lodash@4.17.20...4.17.21)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

packages/docs/yarn.lock

@@ -4963,6 +4963,11 @@ hoist-non-react-statics@^3.1.0:
   dependencies:
     react-is "^16.7.0"
 
+holderjs@^2.9.9:
+  version "2.9.9"
+  resolved "https://registry.yarnpkg.com/holderjs/-/holderjs-2.9.9.tgz#e0f65439ac658c4188abcea3c3b0a327d0ebb67d"
+  integrity sha512-ceWPz1MrR3dxOoZXiom+G48+l1VPG3TcjBw9fq5iwCiZAMvYX8Aia13GOxT7DoV/AcSyTH7Vvr11ygjZP9qn4w==
+
 hoopy@^0.1.4:
   version "0.1.4"
   resolved "https://registry.yarnpkg.com/hoopy/-/hoopy-0.1.4.tgz#609207d661100033a9a9402ad3dea677381c1b1d"
@@ -6113,9 +6118,9 @@ [email protected], lodash.uniq@^4.5.0:
   integrity sha1-0CJTc662Uq3BvILklFM5qEJ1R3M=
 
 lodash@^4.17.11, lodash@^4.17.14, lodash@^4.17.15, lodash@^4.17.19, lodash@^4.17.20, lodash@^4.17.5:
-  version "4.17.20"
-  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.20.tgz#b44a9b6297bcb698f1c51a3545a2b3b368d59c52"
-  integrity sha512-PlhdFcillOINfeV7Ni6oF1TAEayyZBoZ8bcshTHqOYJYlrqzRK5hagpagky5o4HfCzzd1TRkXPMFq6cKk9rGmA==
+  version "4.17.21"
+  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.21.tgz#679591c564c3bffaae8454cf0b3df370c3d6911c"
+  integrity sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZVGedAJv8XZ1tvj5FvSg==
 
 loglevel@^1.6.8:
   version "1.7.1"