Bump ex_doc from 0.29.2 to 0.29.3

Bumps [ex_doc](https://github.com/elixir-lang/ex_doc) from 0.29.2 to 0.29.3.
- [Release notes](https://github.com/elixir-lang/ex_doc/releases)
- [Changelog](https://github.com/elixir-lang/ex_doc/blob/v0.29.3/CHANGELOG.md)
- [Commits](https://github.com/elixir-lang/ex_doc/compare/v0.29.2...v0.29.3)

---
updated-dependencies:
- dependency-name: ex_doc
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

mix.lock

@@ -6,7 +6,7 @@
   "epam": {:hex, :epam, "1.0.12", "2a5625d4133bca4b3943791a3f723ba764455a461ae9b6ba5debb262efcf4b40", [:rebar3], [], "hexpm", "54c166c4459cef72f2990a3d89a8f0be27180fe0ab0f24b28ddcc3b815f49f7f"},
   "eredis": {:hex, :eredis, "1.2.0", "0b8e9cfc2c00fa1374cd107ea63b49be08d933df2cf175e6a89b73dd9c380de4", [:rebar3], [], "hexpm", "d9b5abef2c2c8aba8f32aa018203e0b3dc8b1157773b254ab1d4c2002317f1e1"},
   "esip": {:hex, :esip, "1.0.49", "7949c288d1e094cb44bff5499231939e34c2ace06de8bef950a341edb1743357", [:rebar3], [{:fast_tls, "1.1.16", [hex: :fast_tls, repo: "hexpm", optional: false]}, {:p1_utils, "1.0.25", [hex: :p1_utils, repo: "hexpm", optional: false]}, {:stun, "1.2.7", [hex: :stun, repo: "hexpm", optional: false]}], "hexpm", "a1379ced50c3a2a8f82a77b3184e94c3b87782e90e5ddc0d2baf5b654ecfaa11"},
-  "ex_doc": {:hex, :ex_doc, "0.29.2", "dfa97532ba66910b2a3016a4bbd796f41a86fc71dd5227e96f4c8581fdf0fdf0", [:mix], [{:earmark_parser, "~> 1.4.19", [hex: :earmark_parser, repo: "hexpm", optional: false]}, {:makeup_elixir, "~> 0.14", [hex: :makeup_elixir, repo: "hexpm", optional: false]}, {:makeup_erlang, "~> 0.1", [hex: :makeup_erlang, repo: "hexpm", optional: false]}], "hexpm", "6b5d7139eda18a753e3250e27e4a929f8d2c880dd0d460cb9986305dea3e03af"},
+  "ex_doc": {:hex, :ex_doc, "0.29.3", "f07444bcafb302db86e4f02d8bbcd82f2e881a0dcf4f3e4740e4b8128b9353f7", [:mix], [{:earmark_parser, "~> 1.4.31", [hex: :earmark_parser, repo: "hexpm", optional: false]}, {:makeup_elixir, "~> 0.14", [hex: :makeup_elixir, repo: "hexpm", optional: false]}, {:makeup_erlang, "~> 0.1", [hex: :makeup_erlang, repo: "hexpm", optional: false]}], "hexpm", "3dc6787d7b08801ec3b51e9bd26be5e8826fbf1a17e92d1ebc252e1a1c75bfe1"},
   "ezlib": {:hex, :ezlib, "1.0.12", "ffe906ba10d03aaee7977e1e0e81d9ffc3bb8b47fb9cd8e2e453507a2e56221f", [:rebar3], [{:p1_utils, "1.0.25", [hex: :p1_utils, repo: "hexpm", optional: false]}], "hexpm", "30e94355fb42260aab6e12582cb0c56bf233515e655c8aeaf48760e7561e4ebb"},
   "fast_tls": {:hex, :fast_tls, "1.1.16", "85fa7f3112ea4ff5ccb4f3abadc130a8c855ad74eb00869487399cb0c322d208", [:rebar3], [{:p1_utils, "1.0.25", [hex: :p1_utils, repo: "hexpm", optional: false]}], "hexpm", "aa08cca89b4044e74f1f12e399817d8beaeae3ee006c98a893c0bfb1d81fba51"},
   "fast_xml": {:hex, :fast_xml, "1.1.49", "67d9bfcadd04efd930e0ee1412b5ea09d3e791f1fdbd4d3e9a8c8f29f8bfed8c", [:rebar3], [{:p1_utils, "1.0.25", [hex: :p1_utils, repo: "hexpm", optional: false]}], "hexpm", "01da064d2f740818956961036637fee2475c17bf8aab9442217f90dc77883593"},