CI: Only publish on main

Author: w1th0utnam3

.github/workflows/build.yml

@@ -86,7 +86,7 @@ jobs:
   publish:
     name: Publish to crates.io
     runs-on: ubuntu-latest
-    if: ${{ startsWith(github.ref, 'refs/tags/v') || github.event_name == 'workflow_dispatch' }}
+    if: ${{ (startsWith(github.ref, 'refs/tags/v') || github.event_name == 'workflow_dispatch') && github.ref == 'refs/heads/main' }}
     needs: [check_format, build_workspace, build_lib_all_features, build_lib_no_default_features]
     steps:
       - uses: actions/checkout@v4

.github/workflows/pysplashsurf_CI.yml

@@ -316,7 +316,7 @@ jobs:
   publish:
     name: Publish to PyPI
     runs-on: ubuntu-latest
-    if: ${{ startsWith(github.ref, 'refs/tags/v') || github.event_name == 'workflow_dispatch' }}
+    if: ${{ (startsWith(github.ref, 'refs/tags/v') || github.event_name == 'workflow_dispatch') && github.ref == 'refs/heads/main' }}
     needs: [linux_wheels, macos_wheels, windows_wheels, sdist, tests, docs]
     steps:
       - uses: actions/download-artifact@v4