Update GitHub Actions release workflow and bump version to v0.5.8

- .github/workflows/go.yml
  - Updated repository `permissions` from `contents: read` to `contents: write`.
  - Fixed misaligned spaces in `go build` commands for release binaries.
  - Corrected `go build` syntax for cmd executables.

- pkg/version/version
  - Updated version from v0.5.7 to v0.5.8.

.github/workflows/go.yml

@@ -54,7 +54,7 @@ jobs:
   release:
     runs-on: ubuntu-latest
     permissions:
-      contents: read
+      contents: write
       packages: write
 
     steps:
@@ -88,8 +88,8 @@ jobs:
           # Build cmd executables
           for cmd in lerproxy nauth nurl vainstr walletcli; do
             echo "Building $cmd"
-            GOOS=linux GOARCH=amd64 CGO_ENABLED=0 go build -o --ldflags '-extldflags "-static"'  release-binaries/${cmd}-${VERSION}-linux-amd64 ./cmd/${cmd}
-            GOOS=linux GOARCH=arm64 CGO_ENABLED=0 go build -o --ldflags '-extldflags "-static"'  release-binaries/${cmd}-${VERSION}-linux-arm64 ./cmd/${cmd}
+            GOOS=linux GOARCH=amd64 CGO_ENABLED=0 go build --ldflags '-extldflags "-static"' -o release-binaries/${cmd}-${VERSION}-linux-amd64 ./cmd/${cmd}
+            GOOS=linux GOARCH=arm64 CGO_ENABLED=0 go build --ldflags '-extldflags "-static"' -o release-binaries/${cmd}-${VERSION}-linux-arm64 ./cmd/${cmd}
             GOOS=darwin GOARCH=amd64 CGO_ENABLED=0 go build -o release-binaries/${cmd}-${VERSION}-darwin-amd64 ./cmd/${cmd}
             GOOS=darwin GOARCH=arm64 CGO_ENABLED=0 go build -o release-binaries/${cmd}-${VERSION}-darwin-arm64 ./cmd/${cmd}
             GOOS=windows GOARCH=amd64 CGO_ENABLED=0 go build -o release-binaries/${cmd}-${VERSION}-windows-amd64.exe ./cmd/${cmd}

pkg/version/version

@@ -1 +1 @@
-v0.5.7
+v0.5.8