Bump libxml2 to 2.12.4 on PHP 8.1+

Author: GrahamCampbell

php-81/Dockerfile

@@ -141,7 +141,7 @@ RUN mkdir -p ${INSTALL_DIR}/bref/ssl && curl -Lk -o ${CA_BUNDLE} ${CA_BUNDLE_SOU
 # Needed by:
 #   - php
 #   - libnghttp2
-ENV VERSION_XML2=2.11.6
+ENV VERSION_XML2=2.12.4
 ENV XML2_BUILD_DIR=${BUILD_DIR}/xml2
 RUN set -xe; \
     mkdir -p ${XML2_BUILD_DIR}; \

php-82/Dockerfile

@@ -141,7 +141,7 @@ RUN mkdir -p ${INSTALL_DIR}/bref/ssl && curl -Lk -o ${CA_BUNDLE} ${CA_BUNDLE_SOU
 # Needed by:
 #   - php
 #   - libnghttp2
-ENV VERSION_XML2=2.11.6
+ENV VERSION_XML2=2.12.4
 ENV XML2_BUILD_DIR=${BUILD_DIR}/xml2
 RUN set -xe; \
     mkdir -p ${XML2_BUILD_DIR}; \

php-83/Dockerfile

@@ -141,7 +141,7 @@ RUN mkdir -p ${INSTALL_DIR}/bref/ssl && curl -Lk -o ${CA_BUNDLE} ${CA_BUNDLE_SOU
 # Needed by:
 #   - php
 #   - libnghttp2
-ENV VERSION_XML2=2.11.6
+ENV VERSION_XML2=2.12.4
 ENV XML2_BUILD_DIR=${BUILD_DIR}/xml2
 RUN set -xe; \
     mkdir -p ${XML2_BUILD_DIR}; \