Fixed typo

.githooks/post-merge

@@ -28,7 +28,7 @@ get_commit_for_blob () {
 }
 
 write_log_file () {
-    local __date = $(date +"%Y-%m-%dT%T")
+    local __date=$(date +"%Y-%m-%dT%T")
     for fn in $(git diff-tree -r HEAD@{1} HEAD --name-only); do
         if grep -E -q "(DC.*json|dc.*hex|dc.*bin|tariff.*json)" <<< $fn; then
             # called in repository: $fn is e.g. etc/psa_tariff/tariff01.json