bump protobuf-c version to 1.5.2

Looking at the diff, this is mostly changes to the code generator and
not the runtime library, but it appears to have at least one fix for
the runtime library included.

build.zig.zon

@@ -1,12 +1,12 @@
 .{
     .name = .protobuf_c,
     .fingerprint = 0x39094F755166B308,
-    .version = "1.5.0",
+    .version = "1.5.2",
     .minimum_zig_version = "0.15.2",
     .dependencies = .{
         .protobuf_c = .{
-            .url = "git+https://github.com/protobuf-c/protobuf-c?ref=v1.5.0#8c201f6e47a53feaab773922a743091eb6c8972a",
-            .hash = "N-V-__8AAGKbCgBaIPOO-yPY9ojdsggEeyYjVgjZ_eTITOMw",
+            .url = "git+https://github.com/protobuf-c/protobuf-c?ref=v1.5.2#4719fdd7760624388c2c5b9d6759eb6a47490626",
+            .hash = "N-V-__8AAOzKCgADWAaJ_5J9U3rotTnQCw0OBd-Qb3gL-8vW",
         },
     },
     .paths = .{