chore(bazel): update gapic-generator-php to v1.4.8

Google APIs · copybara-github · commit 4fce83e64635 · 2022-06-15T16:16:22.000-07:00
PiperOrigin-RevId: 455243785
diff --git a/WORKSPACE b/WORKSPACE
@@ -314,7 +314,7 @@ yarn_install(
 ##############################################################################
 
 # PHP micro-generator
-_gapic_generator_php_version = "1.4.6"
+_gapic_generator_php_version = "1.4.8"
 
 http_archive(
     name = "gapic_generator_php",
