github/workflows/fstests.yml: set git user and use 12 chars for prefix

Set the commit user and email address to our mailing list and also
increase the commit prefix to 12 characters as 4 is too small to git
show the git sha1sum commit ID.

Signed-off-by: Luis Chamberlain <[email protected]>

Author: mcgrof

.github/workflows/fstests.yml

@@ -31,11 +31,13 @@ jobs:
       - name: Configure git
         run: |
           git config --global --add safe.directory '*'
+          git config --global user.name "kdevops"
+          git config --global user.email "[email protected]"
 
       - name: Run kdevops make defconfig-repo
         run: |
           KDEVOPS_TREE_REF="${{ github.event_name == 'pull_request' && github.event.pull_request.head.sha || github.sha }}"
-          SHORT_PREFIX="$(echo ${KDEVOPS_TREE_REF:0:4})"
+          SHORT_PREFIX="$(echo ${KDEVOPS_TREE_REF:0:12})"
           make KDEVOPS_HOSTS_PREFIX="$SHORT_PREFIX" defconfig-xfs_reflink_4k
 
       - name: Run kdevops make