docs: Mention --enable-regexp-cmd requires the project name key (#…

…2796)

* docs: mention the name key for regexp cmd

* docs: add name key to auto-generation

runatlantis.io/docs/repo-level-atlantis-yaml.md

@@ -92,7 +92,7 @@ grep -P 'backend[\s]+"s3"' **/*.tf |
   sort |
   uniq |
   while read d; do \
-    echo '[ {"dir": "'"$d"'", "autoplan": {"when_modified": ["**/*.tf.*"] }} ]' | yq -PM; \
+    echo '[ {"name": "'"$d"'","dir": "'"$d"'", "autoplan": {"when_modified": ["**/*.tf.*"] }} ]' | yq -PM; \
   done
 ```
 

runatlantis.io/docs/server-configuration.md

@@ -372,9 +372,9 @@ and set `--autoplan-modules` to `false`.
   # or
   ATLANTIS_ENABLE_REGEXP_CMD=true
   ```
-  Enable Atlantis to use regular expressions on plan/apply commands when `-p` flag is passed with it.
+  Enable Atlantis to use regular expressions to run plan/apply commands against defined project names when `-p` flag is passed with it.
 
-  This can be used to run all defined projects in `atlantis.yaml` using `atlantis plan -p .*`.
+  This can be used to run all defined projects (with the `name` key) in `atlantis.yaml` using `atlantis plan -p .*`.
 
   This will not work with `-d` yet and to use `-p` the repo projects must be defined in the repo `atlantis.yaml` file.