chore(deps): update dependency zod to v4 (#758)

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

Author: renovate[bot]

package.json

@@ -86,7 +86,7 @@
     "rxjs": "7.8.1",
     "ts-pattern": "^5.7.1",
     "tslib": "^2.8.1",
-    "zod": "^3.25.76"
+    "zod": "^4.0.5"
   },
   "homepage": "https://github.com/simPod/GrafanaJsonDatasource",
   "engineStrict": true,

yarn.lock

@@ -6420,7 +6420,7 @@ __metadata:
     webpack: "npm:^5.86.0"
     webpack-cli: "npm:^6.0.0"
     webpack-livereload-plugin: "npm:^3.0.2"
-    zod: "npm:^3.25.76"
+    zod: "npm:^4.0.5"
   languageName: unknown
   linkType: soft
 
@@ -12238,9 +12238,9 @@ __metadata:
   languageName: node
   linkType: hard
 
-"zod@npm:^3.25.76":
-  version: 3.25.76
-  resolution: "zod@npm:3.25.76"
-  checksum: 10c0/5718ec35e3c40b600316c5b4c5e4976f7fee68151bc8f8d90ec18a469be9571f072e1bbaace10f1e85cf8892ea12d90821b200e980ab46916a6166a4260a983c
+"zod@npm:^4.0.5":
+  version: 4.0.5
+  resolution: "zod@npm:4.0.5"
+  checksum: 10c0/59449d731ca63849b6bcb14300aa6e2f042d440b3ed294b45c248519aec78780f85a5d1939a62c2ce82e9dc60afca77c8005e0a98d7517b0c2586d6c76940424
   languageName: node
   linkType: hard