build(deps): bump pygments from 2.14.0 to 2.15.0 in /.kokoro (#321)

Bumps [pygments](https://github.com/pygments/pygments) from 2.14.0 to 2.15.0.
- [Release notes](https://github.com/pygments/pygments/releases)
- [Changelog](https://github.com/pygments/pygments/blob/master/CHANGES)
- [Commits](pygments/pygments@2.14.0...2.15.0)

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

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

.kokoro/requirements.txt

@@ -637,9 +637,9 @@ pydantic==1.10.2 \
     --hash=sha256:e0bedafe4bc165ad0a56ac0bd7695df25c50f76961da29c050712596cf092d6d \
     --hash=sha256:e9069e1b01525a96e6ff49e25876d90d5a563bc31c658289a8772ae186552236
     # via fastapi
-pygments==2.14.0 \
-    --hash=sha256:b3ed06a9e8ac9a9aae5a6f5dbe78a8a58655d17b43b93c078f094ddc476ae297 \
-    --hash=sha256:fa7bd7bd2771287c0de303af8bfdfc731f51bd2c6a47ab69d117138893b82717
+pygments==2.15.0 \
+    --hash=sha256:77a3299119af881904cd5ecd1ac6a66214b6e9bed1f2db16993b54adede64094 \
+    --hash=sha256:f7e36cffc4c517fbc252861b9a6e4644ca0e5abadf9a113c72d1358ad09b9500
     # via
     #   ipython
     #   readme-renderer
@@ -746,10 +746,6 @@ secretstorage==3.3.3 \
     --hash=sha256:2403533ef369eca6d2ba81718576c5e0f564d5cca1b58f73a8b23e7d4eeebd77 \
     --hash=sha256:f356e6628222568e3af06f2eba8df495efa13b3b63081dafd4f7d9a7b7bc9f99
     # via keyring
-setuptools==67.0.0 \
-    --hash=sha256:883131c5b6efa70b9101c7ef30b2b7b780a4283d5fc1616383cdf22c83cbefe6 \
-    --hash=sha256:9d790961ba6219e9ff7d9557622d2fe136816a264dd01d5997cfc057d804853d
-    # via -r requirements.in
 six==1.16.0 \
     --hash=sha256:1e61c37477a1626458e36f7b1d82aa5c9b094fa4802892072e49de9c60c4c926 \
     --hash=sha256:8abb2f1d86890a2dfb989f9a77cfcfd3e47c2a354b01111771326f8aa26e0254