docs: add gno {env,fmt} to go-gno-compatibility (#2974)

<!-- please provide a detailed description of the changes made in this
pull request. -->
gno env and gno fmt missing in the docs.
<details><summary>Contributors' checklist...</summary>

- [ ] Added new tests, or not needed, or not feasible
- [ ] Provided an example (e.g. screenshot) to aid review or the PR is
self-explanatory
- [ ] Updated the official documentation or not needed
- [ ] No breaking changes were made, or a `BREAKING CHANGE: xxx` message
was included in the description
- [ ] Added references to related issues and PRs
- [ ] Provided any useful hints for running manual tests
</details>

docs/reference/go-gno-compatibility.md

@@ -303,9 +303,9 @@ Legend:
 | go build          | gno transpile -gobuild    | same intention, limited compatibility                                 |
 | go clean          | gno clean                 | same intention, limited compatibility                                 |
 | go doc            | gno doc                   | limited compatibility; see https://github.com/gnolang/gno/issues/522  |
-| go env            |                           |                                                                       |
+| go env            | gno env                   |                                                                       |
 | go fix            |                           |                                                                       |
-| go fmt            |                           | gofmt (& similar tools, like gofumpt) works on gno code.              |
+| go fmt            | gno fmt                   | gofmt (& similar tools, like gofumpt) works on gno code.              |
 | go generate       |                           |                                                                       |
 | go get            |                           | see `gno mod download`.                                               |
 | go help           | gno $cmd --help           | ie. `gno doc --help`                                                  |