Bump prefix-dev/setup-pixi from 0.5.1 to 0.8.1 (#20)

Bumps [prefix-dev/setup-pixi](https://github.com/prefix-dev/setup-pixi) from 0.5.1 to 0.8.1.
- [Release notes](https://github.com/prefix-dev/setup-pixi/releases)
- [Commits](prefix-dev/setup-pixi@v0.5.1...v0.8.1)

---
updated-dependencies:
- dependency-name: prefix-dev/setup-pixi
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/build.yaml

@@ -31,7 +31,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - uses: prefix-dev/setup-pixi@v0.5.1
+      - uses: prefix-dev/setup-pixi@v0.8.1
         with:
           cache: true
           cache-write: ${{ github.event_name == 'push' && github.ref_name == 'master' }}
@@ -48,7 +48,7 @@ jobs:
         with:
           ref: ${{ needs.find-tag.outputs.latest-tag }}
 
-      - uses: prefix-dev/setup-pixi@v0.5.1
+      - uses: prefix-dev/setup-pixi@v0.8.1
         with:
           cache: true
           cache-write: ${{ github.event_name == 'push' && github.ref_name == 'master' }}
@@ -68,7 +68,7 @@ jobs:
         with:
           fetch-depth: 0
 
-      - uses: prefix-dev/setup-pixi@v0.5.1
+      - uses: prefix-dev/setup-pixi@v0.8.1
         with:
           cache: true
           cache-write: ${{ github.event_name == 'push' && github.ref_name == 'master' }}
@@ -93,7 +93,7 @@ jobs:
           ref: ${{ needs.find-tag.outputs.latest-tag }}
           fetch-depth: 0
 
-      - uses: prefix-dev/setup-pixi@v0.5.1
+      - uses: prefix-dev/setup-pixi@v0.8.1
         with:
           cache: true
           cache-write: ${{ github.event_name == 'push' && github.ref_name == 'master' }}