Merge branch 'master' into test-infrastructure-improvements

Author: rwgk

.github/dependabot.yml

@@ -4,12 +4,8 @@ updates:
   - package-ecosystem: "github-actions"
     directory: "/"
     schedule:
-      interval: "weekly"
+      interval: "monthly"
     groups:
       actions:
         patterns:
           - "*"
-    ignore:
-      - dependency-name: actions/checkout
-        versions:
-          - "<5"

.github/workflows/ci.yml

@@ -297,7 +297,7 @@ jobs:
 
     - name: Valgrind cache
       if: matrix.valgrind
-      uses: actions/cache@v4
+      uses: actions/cache@v5
       id: cache-valgrind
       with:
         path: valgrind
@@ -786,7 +786,8 @@ jobs:
     timeout-minutes: 90
 
     steps:
-    - uses: actions/checkout@v1  # v1 is required to run inside docker
+    # v1 required for i386/debian container; pinned to SHA to prevent dependabot updates
+    - uses: actions/checkout@544eadc6bf3d226fd7a7a9f0dc5b5bf7ca0675b9  # v1
 
     - name: Install requirements
       run: |

.github/workflows/nightlies.yml

@@ -33,7 +33,7 @@ jobs:
           nox -s build
           nox -s build_global
 
-      - uses: actions/upload-artifact@v5
+      - uses: actions/upload-artifact@v6
         with:
           name: Packages
           path: dist/*
@@ -44,7 +44,7 @@ jobs:
     needs: [build_wheel]
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/download-artifact@v6
+      - uses: actions/download-artifact@v7
         with:
           name: Packages
           path: dist
@@ -53,7 +53,7 @@ jobs:
         run: ls -lha dist/*.whl
 
       - name: Upload wheel to Anaconda Cloud as nightly
-        uses: scientific-python/upload-nightly-action@b36e8c0c10dbcfd2e05bf95f17ef8c14fd708dbf # 0.6.2
+        uses: scientific-python/upload-nightly-action@5748273c71e2d8d3a61f3a11a16421c8954f9ecf # 0.6.3
         with:
           artifacts_path: dist
           anaconda_nightly_upload_token: ${{ secrets.ANACONDA_ORG_UPLOAD_TOKEN }}

.github/workflows/pip.yml

@@ -72,13 +72,13 @@ jobs:
       run: twine check dist/*
 
     - name: Save standard package
-      uses: actions/upload-artifact@v5
+      uses: actions/upload-artifact@v6
       with:
         name: standard
         path: dist/pybind11-*
 
     - name: Save global package
-      uses: actions/upload-artifact@v5
+      uses: actions/upload-artifact@v6
       with:
         name: global
         path: dist/*global-*
@@ -100,7 +100,7 @@ jobs:
 
     steps:
     # Downloads all to directories matching the artifact names
-    - uses: actions/download-artifact@v6
+    - uses: actions/download-artifact@v7
 
     - name: Generate artifact attestation for sdist and wheel
       uses: actions/attest-build-provenance@v3