ci: add static musl build for Glama compatibility

Adds x86_64-unknown-linux-musl target to release matrix, producing
chisel-linux-x86_64-musl — a fully static binary with no glibc dependency,
required for deployment on Glama (debian:bookworm-slim / glibc 2.36).

Made-with: Cursor

Author: ckanthony

.github/workflows/release.yml

@@ -20,6 +20,10 @@ jobs:
           - target: x86_64-unknown-linux-gnu
             runner: ubuntu-latest
             artifact: chisel-linux-x86_64
+          - target: x86_64-unknown-linux-musl
+            runner: ubuntu-latest
+            artifact: chisel-linux-x86_64-musl
+            use_musl: true
           - target: aarch64-unknown-linux-gnu
             runner: ubuntu-latest
             artifact: chisel-linux-arm64
@@ -50,6 +54,10 @@ jobs:
           key: release-${{ matrix.target }}-${{ hashFiles('**/Cargo.lock') }}
           restore-keys: release-${{ matrix.target }}-
 
+      - name: Install musl tools
+        if: matrix.use_musl
+        run: sudo apt-get install -y musl-tools
+
       - name: Install cross
         if: matrix.use_cross
         uses: taiki-e/install-action@cross