build: update buildroot to 2023.11.x and linux 5.15.x LTS

Signed-off-by: AuxXxilium <info@auxxxilium.tech>

.github/workflows/autobuild.yml

@@ -86,7 +86,7 @@ jobs:
           sudo mount ${LOOPX}p3 "/tmp/p3"
 
           echo "Get Buildroot"
-          getBuildroot "2023.08.x" "br"
+          getBuildroot "2023.11.x" "br"
           [ ! -f "br/bzImage-arc" ] || [ ! -f "br/initrd-arc" ] && return 1
           
           echo "Repack initrd"

.github/workflows/build.yml

@@ -28,7 +28,7 @@ on:
         type: boolean
       br_version:
         description: "buildroot version"
-        default: "2023.08.x"
+        default: "2023.11.x"
         type: string
       addons_version:
         description: "addons version"