This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [cisco/libsrtp](https://github.com/cisco/libsrtp) | minor | `v2.5.0` -> `v2.6.0` |

---

### Release Notes

<details>
<summary>cisco/libsrtp (cisco/libsrtp)</summary>

### [`v2.6.0`](https://github.com/cisco/libsrtp/releases/tag/v2.6.0): libSRTP 2.6.0

[Compare Source](cisco/libsrtp@v2.5.0...v2.6.0)

#### What's Changed

-   cmake: Support configuring as subproject by [@&#8203;yangskyboxlabs](https://github.com/yangskyboxlabs) in cisco/libsrtp#640
-   cmake: Rename TEST_APPS as LIBSRTP_TEST_APPS option by [@&#8203;yangskyboxlabs](https://github.com/yangskyboxlabs) in cisco/libsrtp#641
-   Add a missing typedef for stream list ctx by [@&#8203;Lastique](https://github.com/Lastique) in cisco/libsrtp#643
-   Add x86 SIMD optimizations to crypto datatypes by [@&#8203;Lastique](https://github.com/Lastique) in cisco/libsrtp#507
-   fix typo by [@&#8203;uniontech-lilinjie](https://github.com/uniontech-lilinjie) in cisco/libsrtp#648
-   iv length is constant so set only once by [@&#8203;pabuhler](https://github.com/pabuhler) in cisco/libsrtp#649
-   Fix library version in Doxygen docs by [@&#8203;Lastique](https://github.com/Lastique) in cisco/libsrtp#654
-   remove comma from srtp_profile_t enum value. by [@&#8203;melchi45](https://github.com/melchi45) in cisco/libsrtp#658
-   meson.build: implement mbedtls support by [@&#8203;iameli](https://github.com/iameli) in cisco/libsrtp#660
-   remove travis reference from README.md by [@&#8203;pabuhler](https://github.com/pabuhler) in cisco/libsrtp#661
-   try to use ubuntu-latest by [@&#8203;pabuhler](https://github.com/pabuhler) in cisco/libsrtp#664
-   Some srtp_driver fixes by [@&#8203;pabuhler](https://github.com/pabuhler) in cisco/libsrtp#662
-   Some cipher_driver fixes by [@&#8203;pabuhler](https://github.com/pabuhler) in cisco/libsrtp#663
-   start using const on internal arguments by [@&#8203;pabuhler](https://github.com/pabuhler) in cisco/libsrtp#665
-   Cleaning up cmake and enabled more warnings. by [@&#8203;palerikm](https://github.com/palerikm) in cisco/libsrtp#666
-   fix line break in stream_list.yml by [@&#8203;pabuhler](https://github.com/pabuhler) in cisco/libsrtp#668
-   remove use of pointers to 32bit values by [@&#8203;pabuhler](https://github.com/pabuhler) in cisco/libsrtp#667

#### New Contributors

-   [@&#8203;yangskyboxlabs](https://github.com/yangskyboxlabs) made their first contribution in cisco/libsrtp#640
-   [@&#8203;uniontech-lilinjie](https://github.com/uniontech-lilinjie) made their first contribution in cisco/libsrtp#648
-   [@&#8203;melchi45](https://github.com/melchi45) made their first contribution in cisco/libsrtp#658
-   [@&#8203;iameli](https://github.com/iameli) made their first contribution in cisco/libsrtp#660
-   [@&#8203;palerikm](https://github.com/palerikm) made their first contribution in cisco/libsrtp#666

**Full Changelog**: cisco/libsrtp@v2.5.0...v2.6.0

</details>

---

### Configuration

📅 **Schedule**: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied.

♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 **Ignore**: Close this PR and you won't be reminded about this update again.

---

 - [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check this box

---

This PR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate).
<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzNy4yMDIuMSIsInVwZGF0ZWRJblZlciI6IjM5LjE1Ni4xIiwidGFyZ2V0QnJhbmNoIjoibWFpbiJ9-->

Reviewed-on: https://git.walbeck.it/walbeck-it/docker-janus-gateway/pulls/132
Co-authored-by: renovate-bot <bot@walbeck.it>
Co-committed-by: renovate-bot <bot@walbeck.it>

Add a missing typedef for stream list ctx