Use proper casing in CHANGELOG (#10331)

Author: eksperimental

CHANGELOG.md

@@ -305,17 +305,17 @@ Mix also includes two new tasks: `mix app.config`, for application runtime confi
   * [mix] Allow requirements for a Mix task to be listed via the `@requirements` module attribute
   * [mix] Allow optional dependencies to be defined in `:extra_applications` and `:applications`
   * [mix app.config] Add new `mix app.config` task that compiles applications and loads runtime configuration
-  * [mix archive.install] Support `--repo` option on hex packages
+  * [mix archive.install] Support `--repo` option on Hex packages
   * [mix compile] Support the `__mix_recompile__?/0` callback for custom behaviour on when Mix should recompile a given module
   * [mix compile.elixir] Mark modules for path dependencies as "Export dependencies" if they changed but their public interface is the same
   * [mix compile.elixir] Track application boundaries in the Elixir compiler. If you invoke code from Erlang or Elixir standard libraries and you don't depend on the proper applications, a warning will be emitted. A warning will also be emitted if you invoke code from an umbrella sibling that you don't depend on - effectively forbidding cyclic dependencies between apps
   * [mix deps] Sort the dependencies alphabetically before printing
-  * [mix deps] Use `origin/HEAD` as the default git ref in dependencies
+  * [mix deps] Use `origin/HEAD` as the default Git ref in dependencies
   * [mix deps] Redact Git `username`/`password` in output log
   * [mix deps] Support rebar3's `git_subdir` resource type
   * [mix deps.compile] Allow local deps to be skipped on `mix deps.compile`
   * [mix deps.unlock] Print which dependencies get unlocked when using the `--unused` flag
-  * [mix escript.install] Support `--repo` option on hex packages
+  * [mix escript.install] Support `--repo` option on Hex packages
   * [mix new] Add `@impl` to application generated by `mix new --sup`
   * [mix release] Enable overriding `sys.config` location via `RELEASE_SYS_CONFIG` env var
   * [mix release] Boot a release under configuration in interactive mode and then swap to embedded mode (if running on Erlang/OTP 23+)