ci: fix tar command in release workflow

Use explicit tar flags (--create --gzip --file) instead of -czf
to avoid parsing issues in GitHub Actions shell context.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: JheisonMB

.github/workflows/release.yml

@@ -33,7 +33,7 @@ jobs:
       - name: Get version from Cargo.toml
         id: version
         run: |
-          VERSION=$(grep '^version = ' Cargo.toml | head -1 | sed 's/version = "\(.*\)"/\1/' | tr -d '\r')
+          VERSION=$(grep '^version = ' Cargo.toml | head -1 | sed 's/version = "\(.*\)"/\1/' | tr -d '\r' | xargs)
           TAG="v${VERSION}"
           echo "version=${VERSION}" >> $GITHUB_OUTPUT
           echo "tag=${TAG}" >> $GITHUB_OUTPUT
@@ -108,7 +108,7 @@ jobs:
         if: matrix.archive == 'tar.gz'
         run: |
           cd target/${{ matrix.target }}/release
-          tar -czf ../../../gitkit-${{ needs.create-tag.outputs.tag }}-${{ matrix.target }}.tar.gz gitkit
+          tar czf "../../../gitkit-${{ needs.create-tag.outputs.tag }}-${{ matrix.target }}.tar.gz" gitkit
           cd ../../..
 
       - name: Package (windows)
@@ -199,7 +199,7 @@ jobs:
       - name: Check if stable release
         id: version_check
         run: |
-          VERSION=$(grep '^version = ' Cargo.toml | sed 's/.*"\(.*\)".*/\1/')
+          VERSION=$(grep '^version = ' Cargo.toml | head -1 | sed 's/.*"\(.*\)".*/\1/' | xargs)
           if [[ "$VERSION" =~ ^[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
             echo "is_stable=true" >> $GITHUB_OUTPUT
             echo "Version $VERSION is stable — will publish"