build: update to latest @bazel/bazelisk

Update to a later versin of @bazel/bazelisk that properly adheres to the .bazelversion file

Author: josephperrott

package.json

@@ -275,7 +275,7 @@
   "devDependencies": {
     "@angular/ng-dev": "https://github.com/angular/dev-infra-private-ng-dev-builds.git#586406bccb7ae283f803f1c36e127b7b16c942ce",
     "@angular/core": "^20.0.0-rc.2",
-    "@bazel/bazelisk": "1.18.0",
+    "@bazel/bazelisk": "1.26.0",
     "@bazel/buildifier": "8.2.1",
     "@bazel/ibazel": "0.16.2",
     "@types/jasmine": "3.10.7",