Fix bumpversion.cfg

Remove quotes for Cargo.toml fields

Author: axic

.bumpversion.cfg

@@ -23,7 +23,7 @@ values =
 [bumpversion:file:Doxyfile]
 
 [bumpversion:file:bindings/rust/Cargo.toml]
-search = version = \"{current_version}\"
+search = version = "{current_version}"
 
 [bumpversion:file:bindings/rust/integration-test/Cargo.toml]
-search = version = \"{current_version}\"
+search = version = "{current_version}"