docs: fix typo in heading of supported tools-list (cloudflare#25135)

Author: iammati

src/content/docs/workers/ci-cd/builds/build-image.mdx

@@ -25,7 +25,7 @@ The default versions will be updated regularly to the latest minor version. No m
 | **Python**  | 3.13.3          | `PYTHON_VERSION`     | .python-version, runtime.txt |
 | **Ruby**    | 3.4.4           | `RUBY_VERSION`       | .ruby-version                |
 
-### Tools and langauges
+### Tools and languages
 
 | Tool        | Default version  | Environment variable |
 | ----------- | ---------------- | -------------------- |