Update astral-sh/setup-uv action to v8

Author: renovate[bot]

.github/workflows/build-release.yml

@@ -24,7 +24,7 @@ jobs:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
         with:
           persist-credentials: false
-      - uses: astral-sh/setup-uv@37802adc94f370d6bfd71619e3f0bf239e1f3b78 # v7
+      - uses: astral-sh/setup-uv@08807647e7069bb48b6ef5acd8ec9567f424441b # v8.1.0
         with: # zizmor: ignore[cache-poisoning] cache key is lockfile-derived
           enable-cache: true
       - run: uv run tox -e${{ matrix.tox }}
@@ -35,7 +35,7 @@ jobs:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
         with:
           persist-credentials: false
-      - uses: astral-sh/setup-uv@37802adc94f370d6bfd71619e3f0bf239e1f3b78 # v7
+      - uses: astral-sh/setup-uv@08807647e7069bb48b6ef5acd8ec9567f424441b # v8.1.0
         with: # zizmor: ignore[cache-poisoning] cache key is lockfile-derived
           enable-cache: true
       - run: uv build
@@ -54,7 +54,7 @@ jobs:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
         with:
           persist-credentials: false
-      - uses: astral-sh/setup-uv@37802adc94f370d6bfd71619e3f0bf239e1f3b78 # v7
+      - uses: astral-sh/setup-uv@08807647e7069bb48b6ef5acd8ec9567f424441b # v8.1.0
         with: # zizmor: ignore[cache-poisoning] cache key is lockfile-derived
           enable-cache: true
       - run: uv run tox -e lint