Extract and use BUILD_VERSION for release tag

The workflow now extracts BUILD_VERSION from the Makefile and uses it as the release tag name instead of the chain network. This ensures that releases are tagged with the correct version, and adds error handling if the version is not found.

.github/actions/upload-artifacts/action.yml

@@ -29,6 +29,14 @@ runs:
         FILENAME="${{ inputs.chain-network }}-${{ inputs.asset-type }}-${TARGET_OS}-${LOWERCASE_ARCH}"
         echo "key=$FILENAME" >> $GITHUB_OUTPUT
         
+        VERSION=$(grep '^BUILD_VERSION:=' Makefile | cut -d'=' -f2)
+        # Check if a version was found
+        if [ -z "$VERSION" ]; then
+          echo "Error: BUILD_VERSION could not be found in the Makefile." >&2
+          exit 1
+        fi
+        echo "version=${VERSION}" >> "$GITHUB_OUTPUT"
+        
         # Format the output to be a multi-line string.
         # This is the correct way to pass a multi-line string in GITHUB_OUTPUT.
         echo "paths<<EOF" >> "$GITHUB_OUTPUT"
@@ -62,7 +70,7 @@ runs:
     - name: Make Release
       uses: softprops/action-gh-release@v2
       with:
-        tag_name: ${{ inputs.chain-network }}
+        tag_name: ${{ steps.asset.outputs.version }}
         prerelease: contains(inputs.chain-network, 'testnet')
         files: ${{ inputs.asset-directory }}/lethean-*
         target_commitish: ${{ github.sha }}