fix version grep for Cargo.toml in release workflow (#138)

Author: mellowagain

.github/workflows/release.yml

@@ -21,7 +21,7 @@ jobs:
         continue-on-error: ${{ github.event_name == 'workflow_dispatch' }}
         run: |
           # Extract the version from the Cargo.toml
-          VERSION=$(cat "Cargo.toml" | grep '^version' | awk '{ split($0,version,"=") ; gsub(/[\ \"]/, "", version[2]) ; print version[2] }')
+          VERSION=$(cat "Cargo.toml" | grep '^version =' | awk '{ split($0,version,"=") ; gsub(/[\ \"]/, "", version[2]) ; print version[2] }')
           echo version=$VERSION >> "$GITHUB_OUTPUT"
           echo "Cargo.toml version: \`$VERSION\`" >> $GITHUB_STEP_SUMMARY
           if [ "v${VERSION}" != "${{ github.event.release.tag_name }}" ]; then