ci: bump setup-uv to maintained tag scheme (#345)

The old vX tags have been dropped to (force) (usually) better security practices. Dependabot will not update, however, leaving this v7 tag forever. Manually updating now.

See astral-sh/setup-uv#830

Committed via https://github.com/asottile/all-repos

Author: henryiii

.github/workflows/build.yml

@@ -85,7 +85,7 @@ jobs:
         uses: docker/setup-qemu-action@v3.7.0
         if: runner.os == 'Linux' && runner.arch == 'X64'
 
-      - uses: astral-sh/setup-uv@v7
+      - uses: astral-sh/setup-uv@v8.0.0
         with:
           enable-cache: false
 
@@ -144,7 +144,7 @@ jobs:
           python-version: ${{ matrix.python }}
           update-environment: false
 
-      - uses: astral-sh/setup-uv@v7
+      - uses: astral-sh/setup-uv@v8.0.0
         with:
           enable-cache: false