deps: update Ragel

[zhxie]

Signed-off-by: Xie Zhihao [email protected]

Commit Message: deps: update Ragel Additional Description:

A thread of Ragel and its license has been opened in the Slack channel today. Currently, Ragel is under GPLv2. It is legal to use Ragel as a tool to compile, but we have to compile Ragel in Envoy's building system and there is potential risk of the copyright. The patch updates Ragel to the latest version with MIT license to suppress the concern.

Risk Level: Low Testing: N/A Docs Changes: N/A Release Notes: N/A Platform Specific Features: N/A

[repokitteh-read-only[bot]]

CC @envoyproxy/dependency-shepherds: Your approval is needed for changes made to (bazel/.*repos.*\.bzl)|(bazel/dependency_imports\.bzl)|(api/bazel/.*\.bzl)|(.*/requirements\.txt)|(.*\.patch). envoyproxy/dependency-shepherds assignee is @htuch

:cat:

Caused by: https://github.com/envoyproxy/envoy/pull/22635 was opened by zhxie.

see: more, trace.

[zhxie]

CC @mattklein123

[zhxie]

/retest

[repokitteh-read-only[bot]]

Retrying Azure Pipelines: Retried failed jobs in: envoy-presubmit

:cat:

Caused by: a https://github.com/envoyproxy/envoy/pull/22635#issuecomment-1210256824 was created by @zhxie.

see: more, trace.