Bump protobuf version to 31.0

Protobuf 31 contains field descriptor API changes for optional-ness. This change
adjusts to the suggested !required && !repeated.

Author: dibenede

.github/workflows/build.yml

@@ -6,7 +6,7 @@ permissions: read-all
 
 # update in build.yml and codeql.yml at same time
 env:
-  PROTOC_VERSION: 30.1
+  PROTOC_VERSION: "31.0"
 
 jobs:
   build:

.github/workflows/codeql.yml

@@ -15,7 +15,7 @@ permissions: read-all
 
 # update in build.yml and codeql.yml at same time
 env:
-  PROTOC_VERSION: 30.1
+  PROTOC_VERSION: "31.0"
 
 on:
   push:

MODULE.bazel

@@ -1,5 +1,5 @@
 module(name = "protobuf_javascript", version = "3.21.4")
 
-bazel_dep(name = "protobuf", version = "30.1", repo_name = "com_google_protobuf")
+bazel_dep(name = "protobuf", version = "31.0", repo_name = "com_google_protobuf")
 bazel_dep(name = "rules_pkg", version = "1.0.1")
 bazel_dep(name = "abseil-cpp", version = "20250127.0")