Fix a minor bash variable expansion error

It only affects the printing of an information string

snf-image-helper/tasks/10FixPartitionTable.in

@@ -36,7 +36,7 @@ if [ ! -b "$SNF_IMAGE_DEV" ]; then
 fi
 
 if [[ "$SNF_IMAGE_PROPERTY_OSFAMILY" =~ (net)|(open)bsd ]]; then
-    os=${SNF_IMAGE_PROPERTY_OSFAMILY^[bsd]}
+    os=${SNF_IMAGE_PROPERTY_OSFAMILY^^[bsd]}
     warn "Partition resizing currently not supported for ${os^?}"
     exit 0
 fi

snf-image-helper/tasks/20FilesystemResizeUnmounted.in

@@ -46,7 +46,7 @@ if [ -n "$SNF_IMAGE_PROPERTY_DO_SYNC" ]; then
 fi
 
 if [[ "$SNF_IMAGE_PROPERTY_OSFAMILY" =~ (net)|(open)bsd ]]; then
-    os=${SNF_IMAGE_PROPERTY_OSFAMILY^[bsd]}
+    os=${SNF_IMAGE_PROPERTY_OSFAMILY^^[bsd]}
     warn "File sytem resizing currently not supported for ${os^?}"
     exit 0
 fi

snf-image-helper/tasks/30MountImage.in

@@ -47,7 +47,7 @@ fi
 
 if [[ "$SNF_IMAGE_PROPERTY_OSFAMILY" == *bsd ]]; then
     if ! $DUMPFS_UFS "$rootdev" &> /dev/null; then
-        os=${SNF_IMAGE_PROPERTY_OSFAMILY^[bsd]}
+        os=${SNF_IMAGE_PROPERTY_OSFAMILY^^[bsd]}
         log_error "For ${os^?} images only UFS root partitions are supported."
     fi
     ufstype="$(get_ufstype "$rootdev")"