Fix broken links in documentation files (#1677)

Not a big deal, but in the ChangeLog file, some links use the wrong
project name, or use placeholder PR numbers.

And in `DOCUMENTATION.md`, the link to the CLI backend creation doc
returned a 404 due to a missing /

Author: jedisct1

CHANGELOG.md

@@ -250,7 +250,7 @@ both the old and new forms are:
 ### Enhancements:
 
 - feat(manifest): Enable loading Secret Store configuration through environment variables ([#1540](https://github.com/fastly/cli/pull/1540))
-- feat(products): Add enable/disable support for API Discovery ([#1543](https://github.com/fastly/go-fastly/pull/1543))
+- feat(products): Add enable/disable support for API Discovery ([#1543](https://github.com/fastly/cli/pull/1543))
 
 ### Bug fixes:
 
@@ -311,7 +311,7 @@ both the old and new forms are:
 
 ### Dependencies:
 
-- build(deps): `github.com/fastly/go-fastly/v11` from 10 to 111 ([#14XX](https://github.com/fastly/cli/pull/14XX))
+- build(deps): `github.com/fastly/go-fastly/v11` from 10 to 11 ([#1514](https://github.com/fastly/cli/pull/1514))
 - build(deps): `golang.org/x/sys` from 0.33.0 to 0.34.0 ([#1508](https://github.com/fastly/cli/pull/1508))
 - build(deps): `golang.org/x/term` from 0.32.0 to 0.33.0 ([#1508](https://github.com/fastly/cli/pull/1508))
 - build(deps): `golang.org/x/crypto` from 0.39.0 to 0.40.0 ([#1508](https://github.com/fastly/cli/pull/1508))
@@ -1963,7 +1963,7 @@ a single character (e.g. `--k` and `--v`). These were corrected to `--key` and
 - Make `--name` flag for `service search` command a required flag [#529](https://github.com/fastly/cli/pull/529)
 - Update config `last_checked` field even on config load error [#528](https://github.com/fastly/cli/pull/528)
 - Implement Compute@Edge Free Trial Activation [#531](https://github.com/fastly/cli/pull/531)
-- Bump Rust toolchain constraint to `1.56.1` for 2021 edition [#533](https://github.com/fastly/cli/pull/533533533533533)
+- Bump Rust toolchain constraint to `1.56.1` for 2021 edition [#533](https://github.com/fastly/cli/pull/533)
 - Support Arch User Repositories [#530](https://github.com/fastly/cli/pull/530)
 
 ## [v1.6.0](https://github.com/fastly/cli/releases/tag/v1.6.0) (2022-01-20)

DOCUMENTATION.md

@@ -2,6 +2,6 @@
 
 The help output from the Fastly CLI is consumed by the Fastly Developer Hub to produce online documentation: https://www.fastly.com/documentation/reference/cli
 
-Part of the documentation is to provide additional usage examples and links to APIs used by the CLI commands (example: https://www.fastly.com/documentation/reference/clibackend/create/#examples).
+Part of the documentation is to provide additional usage examples and links to APIs used by the CLI commands (example: https://www.fastly.com/documentation/reference/cli/backend/create/#examples).
 
 These examples and API references are defined in [`pkg/app/metadata.json`](./pkg/app/metadata.json).

RELEASE.md

@@ -10,7 +10,7 @@
 1. Merge CHANGELOG.
 1. Rebase latest remote main branch locally (`git pull --rebase origin main`).
 1. Create a new signed tag (replace `{{remote}}` with the remote pointing to the official repository i.e. `origin` or `upstream` depending on your Git workflow): `tag=vX.Y.Z && git tag -s $tag -m $tag && git push {{remote}} $tag`
-    - Triggers a [github action](https://github.com/fastly/cli/blob/main/.github/workflows/tag_release.yml) that produces a 'draft' release.
+    - Triggers a [github action](https://github.com/fastly/cli/blob/main/.github/workflows/tag_to_draft_release.yml) that produces a 'draft' release.
 1. Copy/paste CHANGELOG into the [draft release](https://github.com/fastly/cli/releases).
 1. Publish draft release.