Actions: Update GitHub made action versions

.github/workflows/build-libfp-linux.yml

@@ -83,7 +83,7 @@ jobs:
       if: matrix.os == 'ubuntu-22.04'
       run: sudo apt-get install libwayland-dev
     - name: Checkout libfp
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
       with:
         path: ${{ env.libfp_src_suffix }}
         fetch-depth: 0 # Required for verbose versioning to work correctly
@@ -107,7 +107,7 @@ jobs:
         artifact_name="$(basename "$cpack_name" .zip) [${{ matrix.cxx_comp }}]"
         echo "current_artifact_name=$artifact_name" >> $GITHUB_ENV
     - name: Upload libfp build artifact
-      uses: actions/upload-artifact@v3
+      uses: actions/upload-artifact@v4
       with:
         name: ${{ env.current_artifact_name }}
         path: ${{ env.libfp_install_path }}

.github/workflows/build-libfp-windows.yml

@@ -44,7 +44,7 @@ jobs:
         path: ${{ env.qt_install_dir }}
         credentials: ${{ secrets.qt_ffynnon_cred }}
     - name: Checkout libfp
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
       with:
         path: ${{ env.libfp_src_suffix }}
         fetch-depth: 0 # Required for verbose versioning to work correctly
@@ -70,7 +70,7 @@ jobs:
         $artifact_name=$((Get-ChildItem -Path "${{ env.libfp_package_path }}" -Filter *.zip)[0].BaseName)
         echo "current_artifact_name=$artifact_name" >> $Env:GITHUB_ENV
     - name: Upload libfp build artifact
-      uses: actions/upload-artifact@v3
+      uses: actions/upload-artifact@v4
       with:
         name: ${{ env.current_artifact_name }}
         path: ${{ env.libfp_install_path }}

.github/workflows/master-pull-request-merge-reaction.yml

@@ -62,7 +62,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Download built libfp artifacts
-      uses: actions/download-artifact@v3
+      uses: actions/download-artifact@v4
       with:
         path: ${{ env.artifacts_path }}
     - name: Zip up release artifacts