Update sync-uv workflow reference to pycord-next

Signed-off-by: Lala Sabathil <[email protected]>

Author: Lulalaby

.github/workflows/lib-checks.yml

@@ -34,7 +34,7 @@ jobs:
       - name: "Checkout Repository"
         uses: actions/checkout@v5
       - name: "Setup UV"
-        uses: ./.github/workflows/sync-uv.yml
+        uses: pycord-development/pycord-next/.github/workflows/sync-uv.yml@main
         with:
           groups: 'dev'
       - name: "Run codespell"
@@ -69,7 +69,7 @@ jobs:
         with:
           python-version: "3.13"
       - name: "Setup UV"
-        uses: ./.github/workflows/sync-uv.yml
+        uses: pycord-development/pycord-next/.github/workflows/sync-uv.yml@main
         with:
           groups: 'dev'
       - name: "Setup cache"