pythongh-126524: Run regen-unicodedata as a part of our CI (python#126682)

Author: sobolevn

.github/workflows/build.yml

@@ -120,7 +120,7 @@ jobs:
       - name: Build CPython
         run: |
           make -j4 regen-all
-          make regen-stdlib-module-names regen-sbom
+          make regen-stdlib-module-names regen-sbom regen-unicodedata
       - name: Check for changes
         run: |
           git add -u