Fix documentation referencing git amend instead of git commit --amend

i had this alias for a long long time and forgot it wasn't builtin

Fixes 1110

Signed-off-by: Chmouel Boudjnah <[email protected]>

Author: chmouel

docs/content/docs/install/github_webhook.md

@@ -19,7 +19,7 @@ commit. You can make it quick with this command line snippet (adjust branchname
 the branch) :
 
 ```console
-git amend -a --no-edit && git push --force-with-lease origin branchname
+git commit --amend -a --no-edit && git push --force-with-lease origin branchname
 ```
 
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