Update to loader 0.15.0

.github/workflows/build.yml

@@ -13,17 +13,18 @@ jobs:
         # Use these Java versions
         java: [
           17,    # Current Java LTS & minimum supported by Minecraft
+          21,    # Current Java LTS
         ]
         # and run on both Linux and Windows
         os: [ubuntu-22.04, windows-2022]
     runs-on: ${{ matrix.os }}
     steps:
       - name: checkout repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: validate gradle wrapper
         uses: gradle/wrapper-validation-action@v1
       - name: setup jdk ${{ matrix.java }}
-        uses: actions/setup-java@v3
+        uses: actions/setup-java@v4
         with:
           java-version: ${{ matrix.java }}
           distribution: 'microsoft'
@@ -33,7 +34,7 @@ jobs:
       - name: build
         run: ./gradlew build
       - name: capture build artifacts
-        if: ${{ runner.os == 'Linux' && matrix.java == '17' }} # Only upload artifacts built from latest java on one OS
+        if: ${{ runner.os == 'Linux' && matrix.java == '21' }} # Only upload artifacts built from latest java on one OS
         uses: actions/upload-artifact@v3
         with:
           name: Artifacts