Remove accidental double quote (#14)

Author: Hazelfire

internal/openapi_generator.bzl

@@ -2,7 +2,7 @@
 
 load("@bazel_tools//tools/build_defs/repo:jvm.bzl", "jvm_maven_import_external")
 
-def openapi_tools_generator_bazel_repositories(openapi_generator_cli_version = "5.0.0", sha256 = "839fade01e54ce1eecf012b8c33adb1413cff0cf2e76e23bc8d7673f09626f8e"", prefix = "openapi_tools_generator_bazel"):
+def openapi_tools_generator_bazel_repositories(openapi_generator_cli_version = "5.0.0", sha256 = "839fade01e54ce1eecf012b8c33adb1413cff0cf2e76e23bc8d7673f09626f8e", prefix = "openapi_tools_generator_bazel"):
     jvm_maven_import_external(
         name = "openapi_tools_generator_bazel_cli",
         artifact_sha256 = sha256,