Merge pull request #3232 from stan-dev/dependabot/github_actions/actions/setup-python-6

Bump actions/setup-python from 5 to 6

Author: WardBrian

.github/workflows/header_checks.yml

@@ -27,7 +27,7 @@ jobs:
 
     steps:
     - uses: actions/checkout@v5
-    - uses: actions/setup-python@v5
+    - uses: actions/setup-python@v6
       with:
         python-version: '3.x'
 

.github/workflows/main.yml

@@ -37,7 +37,7 @@ jobs:
 
     steps:
     - uses: actions/checkout@v5
-    - uses: actions/setup-python@v5
+    - uses: actions/setup-python@v6
       with:
         python-version: '3.x'
 
@@ -88,7 +88,7 @@ jobs:
 
     steps:
     - uses: actions/checkout@v5
-    - uses: actions/setup-python@v5
+    - uses: actions/setup-python@v6
       with:
         python-version: '3.x'