gtk4-macros: Update to quick-xml 0.38

Author: sdroege

Cargo.lock

@@ -21,7 +21,7 @@ xml_validation = ["quick-xml"]
 blueprint = []
 
 [dependencies]
-quick-xml = {version = "0.37", optional = true}
+quick-xml = {version = "0.38", optional = true}
 proc-macro-crate = "3.3"
 proc-macro2 = "1.0"
 quote = "1.0"
@@ -31,4 +31,4 @@ syn = {version = "2.0", features = ["full"]}
 futures-channel = "0.3"
 futures-util = "0.3"
 gtk.workspace = true
-trybuild2 = "1.0"
+trybuild2 = "1.0"