build(deps): bump pex from 2.6.2 to 2.7.0

Bumps [pex](https://github.com/pex-tool/pex) from 2.6.2 to 2.7.0.
- [Release notes](https://github.com/pex-tool/pex/releases)
- [Changelog](https://github.com/pex-tool/pex/blob/main/CHANGES.md)
- [Commits](pex-tool/pex@v2.6.2...v2.7.0)

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

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

requirements.txt

@@ -547,9 +547,9 @@ pendulum==3.0.0 \
     --hash=sha256:fa30af36bd8e50686846bdace37cf6707bdd044e5cb6e1109acbad3277232e04 \
     --hash=sha256:fd69b15374bef7e4b4440612915315cc42e8575fcda2a3d7586a0d88192d0c88 \
     --hash=sha256:fde4d0b2024b9785f66b7f30ed59281bd60d63d9213cda0eb0910ead777f6d37
-pex==2.6.2 \
-    --hash=sha256:0fdef3f500fd0d668b69d78c9502ff5b65bba39c7af522f90fa045c054c8164d \
-    --hash=sha256:9a81f406da1501bc8624787d92f29252802b82ca7f205846ebe27634e3be1514
+pex==2.7.0 \
+    --hash=sha256:4cd8ef62aa5059f9a40d1d27cfaf48f181ad8e7a1e21968b13c131d59ccce5fd \
+    --hash=sha256:b4bf91a1ed861d2566ead2312165c8e9e93cace30df00936f977b979b9f8f7b1
 prompt-toolkit==3.0.36 \
     --hash=sha256:3e163f254bef5a03b146397d7c1963bd3e2812f0964bb9a24e6ec761fd28db63 \
     --hash=sha256:aa64ad242a462c5ff0363a7b9cfe696c20d55d9fc60c11fd8e632d064804d305