gleam: Bump to v0.2.0 (#16258)

This PR bumps the Gleam extension to v0.2.0.

Changes:

- Added `/gleam-project` slash command
- Added `gleam-hexdocs` provider for the `/docs` slash command
- https://github.com/zed-industries/zed/pull/12221
- https://github.com/zed-industries/zed/pull/15659

Release Notes:

- N/A

extensions/gleam/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "zed_gleam"
-version = "0.1.3"
+version = "0.2.0"
 edition = "2021"
 publish = false
 license = "Apache-2.0"

extensions/gleam/extension.toml

@@ -1,7 +1,7 @@
 id = "gleam"
 name = "Gleam"
 description = "Gleam support."
-version = "0.1.3"
+version = "0.2.0"
 schema_version = 1
 authors = ["Marshall Bowers <elliott.codes@gmail.com>"]
 repository = "https://github.com/zed-industries/zed"