Make runner config idempotent

Author: Angelin01

.github/workflows/release.yml

@@ -27,7 +27,7 @@ jobs:
         run: |
           sudo apt-get install -yqq crossbuild-essential-arm64 crossbuild-essential-armhf musl-tools
 
-          cat >>~/.cargo/config.toml <<EOF
+          cat > ~/.cargo/config.toml <<EOF
           [target.aarch64-unknown-linux-gnu]
           linker = "aarch64-linux-gnu-gcc"
           [target.aarch64-unknown-linux-musl]