fix: Status icon for Go language that it is generally available. (#3607)

Since Go language  is generally available, change the status icon, too.


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[Apache 2.0 license]: https://www.apache.org/licenses/LICENSE-2.0

Author: touchez-du-bois

gh-pages/content/overview/features.md

@@ -33,7 +33,7 @@ The following target languages are currently offered by `jsii-pacmak`, or are cu
 | Language   | Status                                         |
 | ---------- | ---------------------------------------------- |
 | C#         | :octicons-check-circle-24: Generally Available |
-| Go         | :octicons-tools-24:        Generally Available |
+| Go         | :octicons-check-circle-24: Generally Available |
 | Java       | :octicons-check-circle-24: Generally Available |
 | JavaScript | :octicons-check-circle-24: Generally Available |
 | Kotlin     | :octicons-tools-24:        Development         |