fix(deps): update dependency dockerode to v4

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

plugins/techdocs-backend/package.json

@@ -58,7 +58,7 @@
     "@backstage/plugin-search-backend-module-techdocs": "workspace:^",
     "@backstage/plugin-techdocs-node": "workspace:^",
     "@types/express": "^4.17.6",
-    "dockerode": "^3.3.1",
+    "dockerode": "^4.0.0",
     "express": "^4.17.1",
     "express-promise-router": "^4.1.0",
     "fs-extra": "^11.2.0",