docs: use actions/attest instead of actions/attest-build-provenance (#69)

The actions/attest-build-provenance action is superseded by actions/attest.

Assisted-by: ClaudeCode:claude-opus-5

Author: henryiii

content/basic-packaging/05_publishing_ci.md

@@ -282,7 +282,7 @@ publish:
         path: dist
 
     - name: Generate artifact attestations
-      uses: actions/attest-build-provenance@v4
+      uses: actions/attest@v4
       with:
         subject-path: "dist/*"
 

content/compiled/04_cibuildwheel.md

@@ -226,7 +226,7 @@ upload_all:
         merge-multiple: true
 
     - name: Generate artifact attestations
-      uses: actions/attest-build-provenance@v4
+      uses: actions/attest@v4
       with:
         subject-path: "dist/*"
 

slides/1_05_publishing_ci.md

@@ -233,7 +233,7 @@ publish:
         name: Packages
         path: dist
     - name: Generate artifact attestations
-      uses: actions/attest-build-provenance@v4
+      uses: actions/attest@v4
       with:
         subject-path: "dist/*"
     - uses: pypa/gh-action-pypi-publish@release/v1

slides/2_04_cibuildwheel.md

@@ -202,7 +202,7 @@ upload_all:
         pattern: cibw-*
         path: dist
         merge-multiple: true
-    - uses: actions/attest-build-provenance@v4
+    - uses: actions/attest@v4
       with:
         subject-path: "dist/*"
     - uses: pypa/gh-action-pypi-publish@release/v1