Merge pull request #1109 from SUSE/spack_readme_fixes

Fix link syntax in README

Author: dirkmueller

src/bci_build/package/spack/README.md.j2

@@ -66,5 +66,5 @@ to run Spack commands - like `spack containerize`:
 $ podman run -v $(pwd):/root:Z --rm {{ image.pretty_reference }} containerize > Containerfile
 ```
 For further information, refer to the
-(Spack documentation on container images)[https://spack.readthedocs.io/en/latest/containers.html].
+[Spack documentation on container images](https://spack.readthedocs.io/en/latest/containers.html).
 {% include 'licensing_and_eula.j2' %}