chore(deps): bump conan from 2.25.2 to 2.26.0 in /.devcontainer (#1176)

Bumps [conan](https://github.com/conan-io/conan) from 2.25.2 to 2.26.0.
- [Release notes](https://github.com/conan-io/conan/releases)
- [Commits](conan-io/conan@2.25.2...2.26.0)

---
updated-dependencies:
- dependency-name: conan
  dependency-version: 2.26.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.devcontainer/cpp/requirements.in

@@ -1,3 +1,3 @@
 cmake==4.2.1
-conan==2.25.2
+conan==2.26.0
 gcovr==8.6

.devcontainer/cpp/requirements.txt

@@ -144,8 +144,8 @@ colorlog==6.8.2 \
     --hash=sha256:3e3e079a41feb5a1b64f978b5ea4f46040a94f11f0e8bbb8261e3dbbeca64d44 \
     --hash=sha256:4dcbb62368e2800cb3c5abd348da7e53f6c362dda502ec27c560b2e58a66bd33
     # via gcovr
-conan==2.25.2 \
-    --hash=sha256:3a5214a095cee5c3d21ed45ea31139705703e49fa9c4bb45c4c73f5ee17a1031
+conan==2.26.0 \
+    --hash=sha256:43e3cad85dfa7fecee67e4c1c8a6e5058ab51fe03178b7ce7a2f9788bbc18107
     # via -r cpp/requirements.in
 distro==1.8.0 \
     --hash=sha256:02e111d1dc6a50abb8eed6bf31c3e48ed8b0830d1ea2a1b78c61765c2513fdd8 \