ci: update release workflow to use Go 1.26 and include checksums

Signed-off-by: James Nesbitt <jnesbitt@mirantis.com>

Author: james-nesbitt

.github/workflows/release.yml

@@ -22,7 +22,8 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v5
         with:
-          go-version: "1.25"
+          go-version: "1.26"
+          cache: true
 
       - name: Build binaries
         run: |
@@ -31,14 +32,19 @@ jobs:
           for platform in "${platforms[@]}"; do
             GOOS=${platform%/*}
             GOARCH=${platform#*/}
-            output_name="dist/launchpad_${GOOS}_${GOARCH}"
+            output_name="launchpad_${GOOS}_${GOARCH}"
             if [ "$GOOS" = "windows" ]; then
               output_name+=".exe"
             fi
             echo "Building $output_name"
-            GOOS=$GOOS GOARCH=$GOARCH go build -o "$output_name" ./main.go
+            GOOS=$GOOS GOARCH=$GOARCH go build -o "dist/$output_name" ./main.go
           done
 
+      - name: Generate Checksums
+        run: |
+          cd dist
+          sha256sum * > checksums.txt
+
       - name: Upload artifacts
         uses: actions/upload-artifact@v4
         with:
@@ -61,7 +67,8 @@ jobs:
       - name: Create GitHub Release
         uses: softprops/action-gh-release@v1
         with:
-          files: dist/*
+          files: |
+            dist/*
           generate_release_notes: true
           draft: true
         env: