chore: replace Dependabot references with Renovate

- SECURITY.md: update to mention Renovate (org-wide Mend Renovate)
- PROJECT_ASSESSMENT.md: mark Renovate as integrated (org-wide config)

Closes PRI-389. Parent PRI-387.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

PROJECT_ASSESSMENT.md

@@ -229,7 +229,7 @@ Headlamp v0.39.0 with default `watchPlugins: true` treats catalog-managed plugin
 **Action Items:**
 - [ ] Parallelize test execution
 - [ ] Add npm cache to GitHub Actions
-- [ ] Integrate Dependabot
+- [x] Renovate is configured org-wide via `github>privilegedescalation/.github:renovate-config`
 - [ ] Add semantic-release
 
 ---

SECURITY.md

@@ -212,7 +212,7 @@ If you discover a security vulnerability in this plugin, please report it via:
 
 The project uses:
 - **npm audit**: Runs automatically during `npm install`
-- **Dependabot**: GitHub Dependabot monitors dependencies and creates PRs for updates
+- **Renovate**: Automated dependency updates via Mend Renovate (org-wide configured)
 - **GitHub Actions**: CI workflow runs `npm audit` on every commit
 
 ### Updating Dependencies

pnpm-lock.yaml

@@ -5904,7 +5904,7 @@ snapshots:
       '@mui/system': 5.18.0(@emotion/react@11.14.0(@types/react@19.2.14)(react@18.3.1))(@emotion/styled@11.14.1(@emotion/react@11.14.0(@types/react@19.2.14)(react@18.3.1))(@types/react@19.2.14)(react@18.3.1))(@types/react@18.3.28)(react@18.3.1)
       '@mui/x-date-pickers': 7.29.4(@emotion/react@11.14.0(@types/react@19.2.14)(react@18.3.1))(@emotion/styled@11.14.1(@emotion/react@11.14.0(@types/react@19.2.14)(react@18.3.1))(@types/react@19.2.14)(react@18.3.1))(@mui/material@5.18.0(@emotion/react@11.14.0(@types/react@19.2.14)(react@18.3.1))(@emotion/styled@11.14.1(@emotion/react@11.14.0(@types/react@19.2.14)(react@18.3.1))(@types/react@19.2.14)(react@18.3.1))(@types/react@19.2.14)(react-dom@18.3.1(react@18.3.1))(react@18.3.1))(@mui/system@5.18.0(@emotion/react@11.14.0(@types/react@19.2.14)(react@18.3.1))(@emotion/styled@11.14.1(@emotion/react@11.14.0(@types/react@19.2.14)(react@18.3.1))(@types/react@19.2.14)(react@18.3.1))(@types/react@19.2.14)(react@18.3.1))(@types/react@19.2.14)(react-dom@18.3.1(react@18.3.1))(react@18.3.1)
       '@mui/x-tree-view': 6.17.0(@emotion/react@11.14.0(@types/react@19.2.14)(react@18.3.1))(@emotion/styled@11.14.1(@emotion/react@11.14.0(@types/react@19.2.14)(react@18.3.1))(@types/react@19.2.14)(react@18.3.1))(@mui/material@5.18.0(@emotion/react@11.14.0(@types/react@19.2.14)(react@18.3.1))(@emotion/styled@11.14.1(@emotion/react@11.14.0(@types/react@19.2.14)(react@18.3.1))(@types/react@19.2.14)(react@18.3.1))(@types/react@19.2.14)(react-dom@18.3.1(react@18.3.1))(react@18.3.1))(@mui/system@5.18.0(@emotion/react@11.14.0(@types/react@19.2.14)(react@18.3.1))(@emotion/styled@11.14.1(@emotion/react@11.14.0(@types/react@19.2.14)(react@18.3.1))(@types/react@19.2.14)(react@18.3.1))(@types/react@18.3.28)(react@18.3.1))(@types/react@18.3.28)(react-dom@18.3.1(react@18.3.1))(react@18.3.1)
-      '@reduxjs/toolkit': 2.11.2(react-redux@9.2.0(@types/react@19.2.14)(react@18.3.1)(redux@5.0.1))(react@18.3.1)
+      '@reduxjs/toolkit': 2.11.2(react-redux@9.2.0(@types/react@18.3.28)(react@18.3.1)(redux@5.0.1))(react@18.3.1)
       '@storybook/addon-docs': 9.1.20(@types/react@18.3.28)(storybook@9.1.20(@testing-library/dom@10.4.1)(msw@2.4.9(typescript@5.6.2))(prettier@2.8.8)(vite@6.4.1(@types/node@20.19.37)(terser@5.46.0)(yaml@2.8.2)))
       '@storybook/addon-links': 9.1.20(react@18.3.1)(storybook@9.1.20(@testing-library/dom@10.4.1)(msw@2.4.9(typescript@5.6.2))(prettier@2.8.8)(vite@6.4.1(@types/node@20.19.37)(terser@5.46.0)(yaml@2.8.2)))
       '@storybook/addon-webpack5-compiler-swc': 3.0.0(webpack@5.105.4(@swc/core@1.15.18)(esbuild@0.25.12))
@@ -6361,7 +6361,7 @@ snapshots:
 
   '@popperjs/core@2.11.8': {}
 
-  '@reduxjs/toolkit@2.11.2(react-redux@9.2.0(@types/react@19.2.14)(react@18.3.1)(redux@5.0.1))(react@18.3.1)':
+  '@reduxjs/toolkit@2.11.2(react-redux@9.2.0(@types/react@18.3.28)(react@18.3.1)(redux@5.0.1))(react@18.3.1)':
     dependencies:
       '@standard-schema/spec': 1.1.0
       '@standard-schema/utils': 0.3.0