Revert "Use uv instead of pipx"

This reverts commit 24dd7fef52.

.github/workflows/ci.yml

@@ -13,8 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - run: curl -LsSf https://astral.sh/uv/install.sh | sh
-      - run: uv tool run pre-commit run --all-files
+      - run: pipx run pre-commit run --all-files
   build:
     strategy:
       matrix:
@@ -31,8 +30,7 @@ jobs:
     runs-on: ${{ matrix.runner }}
     steps:
       - uses: actions/checkout@v4
-      - run: curl -LsSf https://astral.sh/uv/install.sh | sh
-      - run: uv tool install poetry
+      - run: pipx install poetry
       - uses: actions/setup-python@v5
         with:
           python-version: "3.12"

.github/workflows/update-dependencies.yml

@@ -13,10 +13,10 @@ jobs:
     strategy:
       matrix:
         include:
-          - cmd: curl -LsSf https://astral.sh/uv/install.sh | sh && uv tool run poetry lock --no-interaction
+          - cmd: pipx run poetry lock --no-interaction
             commit-msg: Update poetry.lock
             branch: update/poetry-lock
-          - cmd: curl -LsSf https://astral.sh/uv/install.sh | sh && uv tool run pre-commit autoupdate
+          - cmd: pipx run pre-commit autoupdate
             commit-msg: Update .pre-commit-config.yaml
             branch: update/pre-commit-config
       fail-fast: false