⬆️ Bump sphinxcontrib-youtube from 1.4.1 to 1.5.0

Bumps [sphinxcontrib-youtube](https://github.com/sphinx-contrib/youtube) from 1.4.1 to 1.5.0.
- [Release notes](https://github.com/sphinx-contrib/youtube/releases)
- [Commits](sphinx-contrib/youtube@v1.4.1...v1.5.0)

---
updated-dependencies:
- dependency-name: sphinxcontrib-youtube
  dependency-version: 1.5.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

environment.yml

@@ -12,7 +12,7 @@ dependencies:
     - sphinx-proof==0.4.0
     - sphinxext-rediraffe==0.3.0
     - sphinx-exercise==1.2.1
-    - sphinxcontrib-youtube==1.4.1
+    - sphinxcontrib-youtube==1.5.0
     - sphinx-togglebutton==0.4.4