Fix dockerfile syntax, disable docker build record upload

Signed-off-by: AlexNDRmac <[email protected]>

Author: AlexNDRmac

.github/workflows/build-debian-ext/Dockerfile

@@ -1,4 +1,4 @@
-FROM debian:11.5-slim as builder
+FROM debian:11.5-slim AS builder
 
 LABEL Description="Base image with custom PHP version based on Debian"
 LABEL name="spx-profiler-debian11"

.github/workflows/main.yml

@@ -16,7 +16,6 @@ on:
 jobs:
   build:
     name: build / php-${{ matrix.php }}-${{ matrix.ts }}-${{ matrix.name }}-${{ matrix.compiler }}
-
     runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: false
@@ -35,6 +34,8 @@ jobs:
           - { name: debian, ts: 'nts', compiler: 'gcc',   os: ubuntu-22.04 }
           # macOS
           - { name: mac,    ts: 'nts', compiler: 'clang', os: macos-13 }
+    env:
+      DOCKER_BUILD_RECORD_UPLOAD: false   # disable docker buildx record upload as build artifact
 
     steps:
       - uses: actions/checkout@v4