CI: avoid deprecated set-output method

Author: uyjulian

.github/workflows/compilation.yml

@@ -24,7 +24,7 @@ jobs:
         
     - name: Get short SHA
       id: slug
-      run: echo "::set-output name=sha8::$(echo ${GITHUB_SHA} | cut -c1-8)"
+      run: printf '%s\n' "sha8=$(printf '%s\n' ${GITHUB_SHA} | cut -c1-8)" >> $GITHUB_OUTPUT
 
     - name: Create tar archive (keep executable bit)
       run: tar -zcvf ps2client-${{ steps.slug.outputs.sha8 }}-${{ matrix.os[0] }}-${{ matrix.os[1] }}.tar.gz bin
@@ -48,7 +48,7 @@ jobs:
         
     - name: Get short SHA
       id: slug
-      run: echo "::set-output name=sha8::$(echo ${GITHUB_SHA} | cut -c1-8)"
+      run: printf '%s\n' "sha8=$(printf '%s\n' ${GITHUB_SHA} | cut -c1-8)" >> $GITHUB_OUTPUT
 
     - name: Create tar archive
       run: tar -zcvf ps2client-${{ steps.slug.outputs.sha8 }}-windows-latest-x86_64.tar.gz bin
@@ -68,7 +68,7 @@ jobs:
 
     - name: Get short SHA
       id: slug
-      run: echo "::set-output name=sha8::$(echo ${GITHUB_SHA} | cut -c1-8)"
+      run: printf '%s\n' "sha8=$(printf '%s\n' ${GITHUB_SHA} | cut -c1-8)" >> $GITHUB_OUTPUT
 
     - name: Download Mac x86_64 artifact
       uses: actions/download-artifact@v4