Bump pytest-xdist from 1.33.0 to 1.34.0 in /requirements (#15084)

Bumps [pytest-xdist](https://github.com/pytest-dev/pytest-xdist) from 1.33.0 to 1.34.0.
- [Release notes](https://github.com/pytest-dev/pytest-xdist/releases)
- [Changelog](https://github.com/pytest-dev/pytest-xdist/blob/master/CHANGELOG.rst)
- [Commits](https://github.com/pytest-dev/pytest-xdist/compare/v1.33.0...v1.34.0)

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

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

requirements/tests.txt

@@ -37,9 +37,9 @@ pytest==6.0.1 \
 pytest-django==3.9.0 \
     --hash=sha256:64f99d565dd9497af412fcab2989fe40982c1282d4118ff422b407f3f7275ca5 \
     --hash=sha256:664e5f42242e5e182519388f01b9f25d824a9feb7cd17d8f863c8d776f38baf9
-pytest-xdist==1.33.0 \
-    --hash=sha256:9149b4010240643a5e206fd0ece6f0a1cd5955dae014cf04610d359e22e22453 \
-    --hash=sha256:833b902b16473162cc0572d5bd7b63f8b843df63a4ada9c8af1270d31db17607
+pytest-xdist==1.34.0 \
+    --hash=sha256:ba5d10729372d65df3ac150872f9df5d2ed004a3b0d499cc0164aafedd8c7b66 \
+    --hash=sha256:340e8e83e2a4c0d861bdd8d05c5d7b7143f6eea0aba902997db15c2a86be04ee
 pytest-forked==1.3.0 \
     --hash=sha256:dc4147784048e70ef5d437951728825a131b81714b398d5d52f17c7c144d8815 \
     --hash=sha256:6aa9ac7e00ad1a539c41bec6d21011332de671e938c7637378ec9710204e37ca