Update prefix-dev/setup-pixi action to v0.8.4 (#199)

* Update prefix-dev/setup-pixi action to v0.8.4

* use full hash everywhere

---------

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: Lucas Colley <lucas.colley8@gmail.com>

Author: renovate[bot]

.github/workflows/ci.yml

@@ -33,7 +33,7 @@ jobs:
       - uses: pre-commit/action@2c7b3805fd2a0fd8c1884dcaebf91fc102a13ecd # v3.0.1
         with:
           extra_args: --hook-stage manual --all-files
-      - uses: prefix-dev/setup-pixi@92815284c57faa15cd896c4d5cfb2d59f32dc43d # v0.8.3
+      - uses: prefix-dev/setup-pixi@8eaba7c61d661f73d558b0b477156b7b62667fa4 # v0.8.4
         with:
           pixi-version: v0.42.1
           cache: true
@@ -59,7 +59,7 @@ jobs:
         with:
           fetch-depth: 0
 
-      - uses: prefix-dev/setup-pixi@92815284c57faa15cd896c4d5cfb2d59f32dc43d # v0.8.3
+      - uses: prefix-dev/setup-pixi@8eaba7c61d661f73d558b0b477156b7b62667fa4 # v0.8.4
         with:
           pixi-version: v0.42.1
           cache: true

.github/workflows/docs-build.yml

@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
-      - uses: prefix-dev/setup-pixi@v0.8.3
+      - uses: prefix-dev/setup-pixi@8eaba7c61d661f73d558b0b477156b7b62667fa4 # v0.8.4
         with:
           pixi-version: v0.42.1
           cache: true