update package.json urls

(cherry picked from commit a34f1983)

contracts/package.json

@@ -14,7 +14,7 @@
   },
   "repository": {
     "type": "git",
-    "url": "https://github.com/OpenZeppelin/openzeppelin-contracts.git"
+    "url": "https://github.com/OpenZeppelin/openzeppelin-contracts-upgrade-safe.git"
   },
   "keywords": [
     "solidity",
@@ -27,7 +27,7 @@
   "author": "OpenZeppelin Community <maintainers@openzeppelin.org>",
   "license": "MIT",
   "bugs": {
-    "url": "https://github.com/OpenZeppelin/openzeppelin-contracts/issues"
+    "url": "https://github.com/OpenZeppelin/openzeppelin-contracts-upgrade-safe/issues"
   },
   "homepage": "https://openzeppelin.com/contracts/"
 }