Fix rustup toolchain and glib-2.0 dependencies

- Set rustup default toolchain to stable
- Add libglib2.0-dev for Rust crate compatibility
- Fix build dependency issues in both workflows

.forgejo/workflows/build-packages.yml

@@ -46,6 +46,9 @@ jobs:
           curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y
           . ~/.cargo/env
           
+          # Set default toolchain for rustup
+          rustup default stable
+          
           # Verify Rust version
           rustc --version
           cargo --version

.forgejo/workflows/test-build.yml

@@ -27,6 +27,9 @@ jobs:
           curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y
           . ~/.cargo/env
           
+          # Set default toolchain for rustup
+          rustup default stable
+          
           # Verify Rust version
           rustc --version
           cargo --version
@@ -38,6 +41,11 @@ jobs:
           cp -r /tmp/bootc-deb/* .
           cp -r /tmp/bootc-deb/.* . 2>/dev/null || true
 
+      - name: Install build dependencies
+        run: |
+          apt update -y
+          apt install -y libglib2.0-dev pkg-config
+
       - name: Check libostree version
         run: |
           pkg-config --modversion ostree-1 || echo "libostree not found"