chore(deps): update angular monorepo to v20

Author: renovate[bot]

package.json

@@ -46,10 +46,10 @@
   },
   "homepage": "https://github.com/esm-bundle/angular__localize#readme",
   "devDependencies": {
-    "@angular/compiler": "15.2.10",
-    "@angular/compiler-cli": "15.2.10",
-    "@angular/core": "15.2.10",
-    "@angular/localize": "15.2.10",
+    "@angular/compiler": "20.3.6",
+    "@angular/compiler-cli": "20.3.6",
+    "@angular/core": "20.3.6",
+    "@angular/localize": "20.3.6",
     "@rollup/plugin-babel": "6.1.0",
     "concurrently": "9.2.1",
     "husky": "9.1.7",