Bump all actions to current.

This should fix the annoying deprecation warnings in our GHA runs.

.github/workflows/ci_build.yml

@@ -30,12 +30,12 @@ jobs:
     runs-on: ${{ matrix.cfg.os }}
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           path: korman
 
       - name: Setup Python
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v5
         with:
           python-version: "3.7"
           architecture: ${{ matrix.cfg.python-arch }}
@@ -55,7 +55,7 @@ jobs:
             -NoInstaller -NoBlender
 
       - name: Upload Standalone Korman
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: korman-standalone-${{ matrix.cfg.str }}
           path: build/package
@@ -80,13 +80,13 @@ jobs:
 
     steps:
       - name: Checkout Korman
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           path: korman
 
       - name: Download Artifacts
         id: download
-        uses: actions/download-artifact@v3
+        uses: actions/download-artifact@v4
         with:
           path: artifacts