Add --always to git describe command

This will at least provide the SHA1 in case there is no tag info for some
reason.  This seems to be the case with GitHub Actions recently.

tribits/doc/utils/gen_doc_utils.sh

@@ -51,7 +51,7 @@ function generate_git_version_file {
     echo
     echo "Generating git version"
     echo
-    git describe --match="$_TRIBITS_TAG_PREFIX*" > TribitsGitVersion.txt || \
+    git describe --always --match="$_TRIBITS_TAG_PREFIX*" > TribitsGitVersion.txt || \
       echo "$_TRIBITS_TAG_PREFIX.{Unknown version}" > TribitsGitVersion.txt
   else
     echo "$_TRIBITS_TAG_PREFIX.{Unknown version}" > TribitsGitVersion.txt