Bump virtualenv from 20.17.1 to 20.36.1

Bumps [virtualenv](https://github.com/pypa/virtualenv) from 20.17.1 to 20.36.1.
- [Release notes](https://github.com/pypa/virtualenv/releases)
- [Changelog](https://github.com/pypa/virtualenv/blob/main/docs/changelog.rst)
- [Commits](pypa/virtualenv@20.17.1...20.36.1)

---
updated-dependencies:
- dependency-name: virtualenv
  dependency-version: 20.36.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

backend/requirements.txt

@@ -239,6 +239,6 @@ typing-extensions==4.4.0 ; python_version >= "3.8" and python_version < "4.0" \
 uvicorn==0.18.3 ; python_version >= "3.8" and python_version < "4.0" \
     --hash=sha256:0abd429ebb41e604ed8d2be6c60530de3408f250e8d2d84967d85ba9e86fe3af \
     --hash=sha256:9a66e7c42a2a95222f76ec24a4b754c158261c4696e683b9dadc72b590e0311b
-virtualenv==20.17.1 ; python_version >= "3.8" and python_version < "4.0" \
-    --hash=sha256:ce3b1684d6e1a20a3e5ed36795a97dfc6af29bc3970ca8dab93e11ac6094b3c4 \
-    --hash=sha256:f8b927684efc6f1cc206c9db297a570ab9ad0e51c16fa9e45487d36d1905c058
+virtualenv==20.36.1 ; python_version >= "3.8" and python_version < "4.0" \
+    --hash=sha256:575a8d6b124ef88f6f51d56d656132389f961062a9177016a50e4f507bbcc19f \
+    --hash=sha256:8befb5c81842c641f8ee658481e42641c68b5eab3521d8e092d18320902466ba