Finalize workflow pins and trigger policy

Author: jeromekelleher

.github/workflows/lint.yml

@@ -5,4 +5,4 @@ on:
 
 jobs:
   Lint:
-    uses: tskit-dev/.github/.github/workflows/lint.yml@main
+    uses: tskit-dev/.github/.github/workflows/lint.yml@v12

.github/workflows/tests.yml

@@ -10,22 +10,22 @@ jobs:
 
   packaging:
     name: Python packaging
-    uses: tskit-dev/.github/.github/workflows/python-packaging.yml@v10
+    uses: tskit-dev/.github/.github/workflows/python-packaging.yml@v12
     with:
       additional-apt-packages: libgsl-dev
       cli-test-cmd: msp --help
 
   test-c:
     name: C tests
-    uses: tskit-dev/.github/.github/workflows/c-tests.yml@main
+    uses: tskit-dev/.github/.github/workflows/c-tests.yml@v12
     with:
       additional-apt-packages: libgsl-dev
       library-directory: lib
     secrets: inherit
 
   test-python-c:
     name: Python-C tests
-    uses: tskit-dev/.github/.github/workflows/python-c-tests.yml@main
+    uses: tskit-dev/.github/.github/workflows/python-c-tests.yml@v12
     with:
       additional-apt-packages: libgsl-dev
     secrets: inherit

.github/workflows/wheels.yml

@@ -8,7 +8,7 @@ on:
 
 jobs:
   build-wheels:
-    uses: tskit-dev/.github/.github/workflows/build-wheels.yml@main
+    uses: tskit-dev/.github/.github/workflows/build-wheels.yml@v12
     # with:
     #   os-list: '["windows-2025"]' #, "ubuntu-24.04"]'