[PATCH] maint: tweak update-release-year for syntax checks

`make syntax-check` complains about redundant variable braces.

* cfg.mk (update-release-year): Delete $${year} braces.
---
 cfg.mk | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/cfg.mk b/cfg.mk
index e936094763de..bce1dd6195c0 100644
--- a/cfg.mk
+++ b/cfg.mk
@@ -27,8 +27,8 @@ update-copyright: update-release-year
 update-release-year:
 	$(AM_V_GEN)year=`date +%Y`; \
 	sed -i \
-		-e "/_LT_COPY/,+1 { /Copyright/ {s:[0-9][0-9][0-9][0-9]:$${year}:} }" \
-		-e "/^Copyright/ {s:[0-9][0-9][0-9][0-9]:$${year}:} " \
+		-e "/_LT_COPY/,+1 { /Copyright/ {s:[0-9][0-9][0-9][0-9]:$$year:} }" \
+		-e "/^Copyright/ {s:[0-9][0-9][0-9][0-9]:$$year:} " \
 		m4/libtool.m4
 
 # Set format of NEWS
-- 
2.43.0