fix(deps): update dependency @apollo/explorer to v3 [security]

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

Author: renovate[bot]

plugins/apollo-explorer/package.json

@@ -22,7 +22,7 @@
     "postpack": "backstage-cli package postpack"
   },
   "dependencies": {
-    "@apollo/explorer": "^2.0.0",
+    "@apollo/explorer": "^3.0.0",
     "@backstage/core-components": "workspace:^",
     "@backstage/core-plugin-api": "workspace:^",
     "@backstage/theme": "workspace:^",