scripts: return to monke

I don't like bash but turns out I dislike Python more

This reverts commit 2628bfc2cd, d77fa13903 and 69f63cced4.

.github/workflows/ci.yml

@@ -28,10 +28,6 @@ jobs:
         distribution: temurin
         java-version: 18
 
-    - name: Set up black (Python)
-      shell: bash
-      run: pip install black==23.3.0
-
     - name: Run unit tests
       uses: gradle/gradle-build-action@a4cf152f482c7ca97ef56ead29bf08bcd953284c # v2.7.0
       with:
@@ -61,12 +57,6 @@ jobs:
         distribution: temurin
         java-version: 18
 
-    - name: Set up Git author
-      shell: bash
-      run: |
-        git config user.name "GitHub Actions"
-        git config user.email noreply@github.com
-
     - name: Decrypt secrets
       run: |
         ./scripts/setup-age.sh
@@ -87,6 +77,6 @@ jobs:
       run: scripts/signing-cleanup.sh
 
     - name: Deploy snapshot
-      run: scripts/deploy-snapshot.py
+      run: scripts/deploy-snapshot.sh
       env:
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}