build: Bump virtualenv from 20.16.5 to 20.26.6 (#139)

Bumps [virtualenv](https://github.com/pypa/virtualenv) from 20.16.5 to 20.26.6.
- [Release notes](https://github.com/pypa/virtualenv/releases)
- [Changelog](https://github.com/pypa/virtualenv/blob/main/docs/changelog.rst)
- [Commits](pypa/virtualenv@20.16.5...20.26.6)

---
updated-dependencies:
- dependency-name: virtualenv
  dependency-type: indirect
...

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

Author: dependabot[bot]

requirements.txt

@@ -14,11 +14,11 @@ cfgv==3.3.1
     # via pre-commit
 click==8.1.3
     # via pip-tools
-distlib==0.3.6
+distlib==0.3.9
     # via virtualenv
 django==4.2.18
     # via -r requirements.in
-filelock==3.8.0
+filelock==3.16.1
     # via virtualenv
 identify==2.5.5
     # via pre-commit
@@ -30,7 +30,7 @@ pep517==0.13.0
     # via build
 pip-tools==6.8.0
     # via -r requirements.in
-platformdirs==2.5.2
+platformdirs==4.3.6
     # via virtualenv
 pre-commit==2.20.0
     # via -r requirements.in
@@ -48,7 +48,7 @@ tomli==2.0.2
     #   pep517
 typing-extensions==4.12.2
     # via asgiref
-virtualenv==20.16.5
+virtualenv==20.26.6
     # via pre-commit
 wheel==0.38.1
     # via