Fix xdist pin.

Author: ionelmc

tox.ini

@@ -36,6 +36,7 @@ setenv =
     PYTHONUNBUFFERED=yes
 
     # Use env vars for (optional) pinning of deps.
+    pytest62:  _DEP_PYTEST=pytest==6.2.5
     pytest80:  _DEP_PYTEST=pytest==8.0.2
     pytest81:  _DEP_PYTEST=pytest==8.1.1
     pytest82:  _DEP_PYTEST=pytest==8.2.2
@@ -47,7 +48,7 @@ setenv =
     xdist34: _DEP_PYTESTXDIST=pytest-xdist==3.4.0
     xdist35: _DEP_PYTESTXDIST=pytest-xdist==3.5.0
     xdist36: _DEP_PYTESTXDIST=pytest-xdist==3.6.1
-    xdist36: _DEP_PYTESTXDIST=pytest-xdist==3.7.0
+    xdist37: _DEP_PYTESTXDIST=pytest-xdist==3.7.0
     xdistdev: _DEP_PYTESTXDIST=git+https://github.com/pytest-dev/pytest-xdist.git#egg=pytest-xdist
 
     coverage72: _DEP_COVERAGE=coverage==7.2.7