Update nginx:1.29.3-alpine Docker digest to b3c656d

Author: renovate[bot]

Dockerfile

@@ -34,7 +34,7 @@ EOF
 # Fix folder permissions, which apparently docker now creates without the exec bit.
 RUN find -type d -perm -004 -print0 | xargs -0 chmod +rx
 
-FROM nginx:1.29.3-alpine@sha256:b23ea6c10814fccb32ac20485c74168ebefa1c3544a3dddfcb33494d24270df8
+FROM nginx:1.29.3-alpine@sha256:b3c656d55d7ad751196f21b7fd2e8d4da9cb430e32f646adcf92441b72f82b14
 
 COPY nginx.conf /etc/nginx/
 COPY --from=build /build /usr/share/nginx/html/