update uv action

Author: pjbull

.github/workflows/tests.yml

@@ -20,6 +20,7 @@ jobs:
       - name: Set up Python and uv
         uses: astral-sh/setup-uv@v6
         with:
+          activate-environment: true
           python-version: "3.11"
 
       - name: Install dependencies
@@ -43,9 +44,10 @@ jobs:
       - uses: actions/checkout@v4
 
       - name: Set up Python and uv
-        uses: astral-sh/setup-uv@v4
+        uses: astral-sh/setup-uv@v6
         with:
           python-version: ${{ matrix.python-version }}
+          activate-environment: true
 
       - name: Install dependencies
         run: |
@@ -84,6 +86,7 @@ jobs:
         uses: astral-sh/setup-uv@v6
         with:
           python-version: "3.11"
+          activate-environment: true
 
       - name: Install dependencies
         run: |
@@ -144,6 +147,7 @@ jobs:
         uses: astral-sh/setup-uv@v6
         with:
           python-version: "3.11"
+          activate-environment: true
 
       - name: Build cloudpathlib
         run: |