ci: update setup-pixi to v0.8.2

> This release bumps @actions/cache to 4.0.0 which now integrates with the new cache service (v2) APIs.
https://github.com/prefix-dev/setup-pixi/releases/tag/v0.8.2

Author: maurosilber

.github/workflows/ci.yml

@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: prefix-dev/[email protected].1
+      - uses: prefix-dev/[email protected].2
         with:
           environments: lint
       - run: pixi run --environment lint lint
@@ -37,7 +37,7 @@ jobs:
             extras: "babel==2.15 matplotlib==3.9.0"
     steps:
       - uses: actions/checkout@v4
-      - uses: prefix-dev/[email protected].1
+      - uses: prefix-dev/[email protected].2
         with:
           environments: ${{ matrix.environment }}
       - name: Install numpy
@@ -81,7 +81,7 @@ jobs:
         numpy: [null, "numpy>=1.23,<2.0.0", "numpy>=2.0.0rc1"]
     steps:
       - uses: actions/checkout@v4
-      - uses: prefix-dev/[email protected].1
+      - uses: prefix-dev/[email protected].2
         with:
           environments: ${{ matrix.environment }}
       - name: Install numpy
@@ -100,7 +100,7 @@ jobs:
         numpy: [null, "numpy>=1.23,<2.0.0", "numpy>=2.0.0rc1"]
     steps:
       - uses: actions/checkout@v4
-      - uses: prefix-dev/[email protected].1
+      - uses: prefix-dev/[email protected].2
         with:
           environments: ${{ matrix.environment }}
       - name: Install numpy
@@ -121,7 +121,7 @@ jobs:
 
     steps:
       - uses: actions/checkout@v4
-      - uses: prefix-dev/[email protected].1
+      - uses: prefix-dev/[email protected].2
         with:
           environments: build
       - name: Build the package

.github/workflows/docs.yml

@@ -7,15 +7,15 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: prefix-dev/[email protected].1
+      - uses: prefix-dev/[email protected].2
         with:
           environments: docs
       - run: pixi run --environment docs docbuild
   doctest:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: prefix-dev/[email protected].1
+      - uses: prefix-dev/[email protected].2
         with:
           environments: docs
       - name: Install locales