Bump pytest-cov from 5.0.0 to 6.0.0 in /tools/deps

Bumps [pytest-cov](https://github.com/pytest-dev/pytest-cov) from 5.0.0 to 6.0.0.
- [Changelog](https://github.com/pytest-dev/pytest-cov/blob/master/CHANGELOG.rst)
- [Commits](pytest-dev/pytest-cov@v5.0.0...v6.0.0)

---
updated-dependencies:
- dependency-name: pytest-cov
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

tools/deps/requirements-tests.txt

@@ -222,9 +222,9 @@ pyparsing==2.4.7 \
     --hash=sha256:c203ec8783bf771a155b207279b9bccb8dea02d8f0c9e5f8ead507bc3246ecc1 \
     --hash=sha256:ef9d7589ef3c200abe66653d3f1ab1033c3c419ae9b9bdb1240a85b024efc88b
     # via packaging
-pytest-cov==5.0.0 \
-    --hash=sha256:4f0764a1219df53214206bf1feea4633c3b558a2925c8b59f144f682861ce652 \
-    --hash=sha256:5837b58e9f6ebd335b0f8060eecce69b662415b16dc503883a02f45dfeb14857
+pytest-cov==6.0.0 \
+    --hash=sha256:eee6f1b9e61008bd34975a4d5bab25801eb31898b032dd55addc93e96fcaaa35 \
+    --hash=sha256:fde0b595ca248bb8e2d76f020b465f3b107c9632e6a1d1705f17834c89dcadc0
 pytest-timeout==2.3.1 \
     --hash=sha256:12397729125c6ecbdaca01035b9e5239d4db97352320af155b3f5de1ba5165d9 \
     --hash=sha256:68188cb703edfc6a18fad98dc25a3c61e9f24d644b0b70f33af545219fc7813e