Bump async from 2.6.3 to 2.6.4 (#27720)

Bumps [async](https://github.com/caolan/async) from 2.6.3 to 2.6.4.
- [Release notes](https://github.com/caolan/async/releases)
- [Changelog](https://github.com/caolan/async/blob/v2.6.4/CHANGELOG.md)
- [Commits](https://github.com/caolan/async/compare/v2.6.3...v2.6.4)

---
updated-dependencies:
- dependency-name: async
  dependency-type: indirect
...

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

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

package-lock.json

@@ -4789,6 +4789,15 @@
         "node": ">=8"
       }
     },
+    "node_modules/async": {
+      "version": "2.6.4",
+      "resolved": "https://registry.npmjs.org/async/-/async-2.6.4.tgz",
+      "integrity": "sha512-mzo5dfJYwAn29PeiJ0zvwTo04zj8HDJj0Mn8TD7sno7q12prdbnasKJHhkm2c1LgrhlJ0teaea8860oxi51mGA==",
+      "optional": true,
+      "dependencies": {
+        "lodash": "^4.17.14"
+      }
+    },
     "node_modules/async-limiter": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/async-limiter/-/async-limiter-1.0.1.tgz",
@@ -15978,15 +15987,6 @@
         "node": ">=0.10.0"
       }
     },
-    "node_modules/pa11y-ci/node_modules/async": {
-      "version": "2.6.3",
-      "resolved": "https://registry.npmjs.org/async/-/async-2.6.3.tgz",
-      "integrity": "sha512-zflvls11DCy+dQWzTW2dzuilv8Z5X/pjfmZOWba6TNIVDm+2UDaJmXSOXlasHKfNBs8oo3M0aT50fDEWfKZjXg==",
-      "optional": true,
-      "dependencies": {
-        "lodash": "^4.17.14"
-      }
-    },
     "node_modules/pa11y-ci/node_modules/brace-expansion": {
       "version": "1.1.11",
       "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.11.tgz",
@@ -25713,6 +25713,15 @@
       "integrity": "sha512-Z7tMw1ytTXt5jqMcOP+OQteU1VuNK9Y02uuJtKQ1Sv69jXQKKg5cibLwGJow8yzZP+eAc18EmLGPal0bp36rvQ==",
       "dev": true
     },
+    "async": {
+      "version": "2.6.4",
+      "resolved": "https://registry.npmjs.org/async/-/async-2.6.4.tgz",
+      "integrity": "sha512-mzo5dfJYwAn29PeiJ0zvwTo04zj8HDJj0Mn8TD7sno7q12prdbnasKJHhkm2c1LgrhlJ0teaea8860oxi51mGA==",
+      "optional": true,
+      "requires": {
+        "lodash": "^4.17.14"
+      }
+    },
     "async-limiter": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/async-limiter/-/async-limiter-1.0.1.tgz",
@@ -34418,15 +34427,6 @@
             "array-uniq": "^1.0.1"
           }
         },
-        "async": {
-          "version": "2.6.3",
-          "resolved": "https://registry.npmjs.org/async/-/async-2.6.3.tgz",
-          "integrity": "sha512-zflvls11DCy+dQWzTW2dzuilv8Z5X/pjfmZOWba6TNIVDm+2UDaJmXSOXlasHKfNBs8oo3M0aT50fDEWfKZjXg==",
-          "optional": true,
-          "requires": {
-            "lodash": "^4.17.14"
-          }
-        },
         "brace-expansion": {
           "version": "1.1.11",
           "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.11.tgz",