Pin GitHub Actions to full-length commit SHAs

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

Author: 4gust

.github/dependabot.yml

@@ -0,0 +1,11 @@
+version: 2
+updates:
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    groups:
+      github-actions:
+        patterns: ["*"]
+    schedule:
+      interval: "weekly"
+    cooldown:
+      default-days: 7

.github/workflows/RunIssueSentinel.yml

@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Run Issue Sentinel
-        uses: Azure/issue-sentinel@v1
+        uses: Azure/issue-sentinel@d1e433f192aa9442d44292b9b6d5d31419639aba # v1.6.1
         with:
           password: ${{secrets.ISSUE_SENTINEL_PASSWORD}}
           enable-similar-issues-scanning: true # Scan for similar issues

.github/workflows/python-package.yml

@@ -22,9 +22,9 @@ jobs:
       contents: read
     runs-on: ubuntu-22.04
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0
     - name: Set up Python
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # v5.6.0
       with:
         python-version: '3.12'
         cache: 'pip'
@@ -38,7 +38,7 @@ jobs:
       # `twine check` catches broken long_description / metadata that would fail PyPI upload.
       run: twine check dist/*
     - name: Upload built artifacts
-      uses: actions/upload-artifact@v4
+      uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
       with:
         name: dist
         path: dist/