ci: fix regex in pre-commit config file

Problem: The `files` regex in `.pre-commit-config.yaml` has an extra
slash in the pattern to detect python files under `t/`, so no files
in that directory are being formatted.

Update the pattern to find some Python files under `t/`, but not all.
Since we don't necessarily want to lint and format every test
python file in the testsuite, just include `t/scripts/*.py` and
`t/python/*.py`.

Author: grondo

.pre-commit-config.yaml

@@ -1,5 +1,5 @@
-files: '^(src/bindings/python/flux|src/cmd|t/.*\\.py)'
-exclude: "^(src/bindings/python/_flux/|src/bindings/python/flux/utils/)"
+files: '^(src/bindings/python/flux|src/cmd|t/python/.*\.py|t/scripts/.*\.py)'
+exclude: "^(src/bindings/python/_flux/|src/bindings/python/flux/utils/|t/python/tap)"
 repos:
   - repo: https://github.com/pre-commit/pre-commit-hooks
     rev: v4.0.1