set pixi version to latest

Author: ChrisBarker-NOAA

.github/workflows/test.yaml

@@ -27,7 +27,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: prefix-dev/[email protected]
         with:
-          pixi-version: $PIXI_VERSION
+          pixi-version: latest
           cache: true
           # auth-host: prefix.dev
           # auth-token: ${{ secrets.PREFIX_DEV_TOKEN }}
@@ -40,7 +40,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: prefix-dev/[email protected]
         with:
-          pixi-version: $PIXI_VERSION
+          pixi-version: latest
           cache: true
           # auth-host: prefix.dev
           # auth-token: ${{ secrets.PREFIX_DEV_TOKEN }}