Fix a typo path for rpi kernel url

Author: niusmallnan

scripts/images/raspberry-pi-hypriot64/Dockerfile.dapper

@@ -15,7 +15,7 @@ COPY rootfs_arm64.tar.gz /source/assets/rootfs_arm64.tar.gz
 ENV URL=https://github.com/DieterReuter/rpi64-kernel/releases/download
 ENV VER=v20180114-121512
 
-RUN curl -fL ${URL}/${VER}/4.9.69-hypriotos-v8.tar.gz > /source/assets/kernel.tar.gz
+RUN curl -fL ${URL}/${VER}/4.9.76-hypriotos-v8.tar.gz > /source/assets/kernel.tar.gz
 RUN curl -fL ${URL}/${VER}/bootfiles.tar.gz > /source/assets/bootfiles.tar.gz
 RUN curl -fL https://github.com/DieterReuter/rpi-bootloader/releases/download/v20180114-121611/rpi-bootloader.tar.gz > /source/assets/rpi-bootfiles.tar.gz