chore(deps): update php docker tag to v8.3

Change-Id: I62976b29ad71294bd447754fbffa3df0df4dbf33
diff --git a/Dockerfile b/Dockerfile
index 43a3841..d7c75f9 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM php:8.1-apache@sha256:e20df709ac9611fde1447de4b56c169520e275d9fca3da0faf9f109e8d0c5b3f
+FROM php:8.3-apache@sha256:a1eeffd475f45e32f6c9d4895c14f2b5418b84cd1ff5aa449655a7c6e71ea94d
 RUN docker-php-ext-install mysqli
 RUN docker-php-ext-enable mysqli
 RUN mkdir -p /var/phpsessions && chown www-data /var/phpsessions