Update more Dockerfiles

Dockerfile

@@ -2,7 +2,7 @@
 #####################################
 # Requires binfm_misc registration
 # https://github.com/multiarch/qemu-user-static#binfmt_misc-register
-ARG DOTNET_VERSION=7.0
+ARG DOTNET_VERSION=8.0
 
 FROM node:20-alpine as web-builder
 ARG JELLYFIN_WEB_VERSION=master

Dockerfile.arm

@@ -2,7 +2,7 @@
 #####################################
 # Requires binfm_misc registration
 # https://github.com/multiarch/qemu-user-static#binfmt_misc-register
-ARG DOTNET_VERSION=7.0
+ARG DOTNET_VERSION=8.0
 
 
 FROM node:20-alpine as web-builder

Dockerfile.arm64

@@ -2,7 +2,7 @@
 #####################################
 # Requires binfm_misc registration
 # https://github.com/multiarch/qemu-user-static#binfmt_misc-register
-ARG DOTNET_VERSION=7.0
+ARG DOTNET_VERSION=8.0
 
 
 FROM node:20-alpine as web-builder