Update sync-uv workflow reference in CI configs

Replaces local sync-uv.yml workflow references with remote workflow from pycord-development/pycord-next repository in all affected GitHub Actions YAML files. This ensures the latest shared workflow is used for setup steps.

Author: Lulalaby

.github/workflows/docs-checks.yml

@@ -42,7 +42,7 @@ 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,docs'
       - name: "Check Links"

.github/workflows/docs-localization-download.yml

@@ -21,7 +21,7 @@ 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,docs'
           extras: 'speed,voice'

.github/workflows/docs-localization-upload.yml

@@ -26,7 +26,7 @@ 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,docs'
           extras: 'speed,voice'

.github/workflows/sync-guild-features.yml

@@ -25,7 +25,7 @@ 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,ci'
       - name: "Run guild features sync"