doc: use my-fork consistently (#702)

Summary:
doc: use `my-fork` consistently

Most of the documentation uses `my-fork` except for two files.

Update those two files for consistency.

Pull Request resolved: #702

Test Plan: CI

Reviewed By: Flameeyes, sggutier

Differential Revision: D50061369

Pulled By: genevievehelsel

fbshipit-source-id: 5c556a4b6136f750ff9d870c2c86a8a8713df931

website/docs/git/intro.md

@@ -76,8 +76,8 @@ If you don't have write access to the repo, you can [fork](https://docs.github.c
 GitHub website, add your fork as a remote, then push to your fork:
 
 ```
-sl paths --add myfork ssh://[email protected]/my-username/sapling.git
-sl push --to myfork/my-new-feature
+sl paths --add my-fork ssh://[email protected]/my-username/sapling.git
+sl push --to my-fork/my-new-feature
 ```
 
 After push, open the repo webpage. You will see GitHub detected the push:

website/docs/introduction/release-notes.md

@@ -51,6 +51,6 @@ This release focuses on correct issues around handling submodules as well as var
     * SCP-style URIs (such as [email protected]:git/git-reference) are now supported for remote names: https://github.com/facebook/sapling/commit/67fa8488e150513d21eedc66b37724d00f2034a9
     * `sl clone --git <URL> --updaterev <branch/commit>` can now be used to clone a specific branch or commit: https://github.com/facebook/sapling/commit/9804c66bb8190a5ab4566c576db391ebe34c2d6b
     * sl rebase -b was reworked for better selecting branching points by avoiding public commits (reverse rebase now works): https://github.com/facebook/sapling/commit/96b767efde6a59dbff31d2808736102b3929067a
-    * sl bookmark --remote can be used to list remote branches. Further, sl bookmark --remote-path myfork --remote tags will list tags from remote myfork:
+    * sl bookmark --remote can be used to list remote branches. Further, sl bookmark --remote-path my-fork --remote tags will list tags from remote myfork:
     * https://github.com/facebook/sapling/commit/e8f57d7902c800bec7ded3c567d9e370460df24e
 * Removed a dependency on gdbm in the Python code, that was causing crashes for some users: https://github.com/facebook/sapling/commit/cfbb6a256b94c6e755db02658ef1a4312303bee6