chore(deps): update ast-grep/ast-grep to 0.31.0 (#18)

Author: github-actions[bot]

action.yml

@@ -77,7 +77,7 @@ runs:
         INPUT_SG_VERSION: ${{ inputs.sg_version }}
         INPUT_SG_CONFIG: ${{ inputs.sg_config }}
         INPUT_SG_FLAGS: ${{ inputs.sg_flags }}
-        DEFAULT_SG_VERSION: 0.30.1
+        DEFAULT_SG_VERSION: 0.31.0
     - if: inputs.reporter == 'sarif'
       uses: github/codeql-action/upload-sarif@v3
       with: