chore(deps): update dependency less to v4.3.0

Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

package.json

@@ -181,7 +181,7 @@
     "js-yaml": "3.14.1",
     "jsonlint": "1.6.3",
     "keymaster": "1.6.2",
-    "less": "4.2.2",
+    "less": "4.3.0",
     "less-loader": "7.3.0",
     "list.js": "2.3.1",
     "mathjax": "2.7.9",

yarn.lock

@@ -1491,7 +1491,7 @@ __metadata:
     jsdom-nogyp: "npm:0.8.3"
     jsonlint: "npm:1.6.3"
     keymaster: "npm:1.6.2"
-    less: "npm:4.2.2"
+    less: "npm:4.3.0"
     less-loader: "npm:7.3.0"
     list.js: "npm:2.3.1"
     lodash: "npm:4.17.21"
@@ -9378,9 +9378,9 @@ __metadata:
   languageName: node
   linkType: hard
 
-"less@npm:4.2.2":
-  version: 4.2.2
-  resolution: "less@npm:4.2.2"
+"less@npm:4.3.0":
+  version: 4.3.0
+  resolution: "less@npm:4.3.0"
   dependencies:
     copy-anything: "npm:^2.0.1"
     errno: "npm:^0.1.1"
@@ -9409,7 +9409,7 @@ __metadata:
       optional: true
   bin:
     lessc: bin/lessc
-  checksum: 10/f9873aee6fe90c4bbdc8cee2c74fba01d2d8ca784ceff8e011ba4560b15b3e97b8768cf5b5b225990ce8e78297c4260d9cf359f7a3325c6c17e4285ba89d74bc
+  checksum: 10/893d0589394ff29ebb245104728906784da061e077c063b89f31b72f162e3724a40ccdf684758c154f777b26afb9a292e85ce371e74b8d2eb90e878e9f99c432
   languageName: node
   linkType: hard