chore(deps): update dependency black to v26 [security] (#14214)

* chore(deps): update dependency black to v26 [security]

* fix: squash versions of python

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Co-authored-by: Jennifer Davis <sigje@google.com>

Author: renovate-bot

compute/client_library/requirements.txt

@@ -1,5 +1,4 @@
 isort==6.0.0; python_version > "3.9"
 isort==5.13.2; python_version <= "3.8"
-black==24.8.0; python_version < "3.9"
-black==24.10.0; python_version >= "3.9"
-google-cloud-compute==1.19.1
+black==26.3.1
+google-cloud-compute==1.19.1