ci: configure Renovate to disable updates for dependencies versioned `0.0.0-PLACEHOLDER` (#41619)

With this change we disable Renovate from updating `@angular/*` peerDependencies which are versioned `0.0.0-PLACEHOLDER`.

Example PR: https://github.com/angular/angular/pull/41615

PR Close #41619

renovate.json

@@ -101,6 +101,10 @@
           "major"
         ],
         "enabled": false
+      },
+      {
+        "matchCurrentVersion": "0.0.0-PLACEHOLDER",
+        "enabled": false
       }
     ]
   }