docs: sync SPACK_VERSION example to v1.1.1 (#196)

* Initial plan

* docs: update SPACK_VERSION example to v1.1.1 in spack-environment.md

Co-authored-by: wdconinc <4656391+wdconinc@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: wdconinc <4656391+wdconinc@users.noreply.github.com>

Author: Copilot

docs/spack-environment.md

@@ -149,7 +149,7 @@ Spack versions can include cherry-picks from newer commits:
 
 ```bash
 # From spack.sh
-SPACK_VERSION="v1.1.0"
+SPACK_VERSION="v1.1.1"
 SPACK_CHERRYPICKS=$(cat <<- EOF
 09f75ee426a2e05e0543570821582480ff823ba5
 a462612b64e97fa7dfe461c32c58553fd6ec63c5