6612: Remove remaining references to X_SNAP and X_CHECKPOINT from unv… (

#1651)

* 6612: Remove remaining references to X_SNAP and X_CHECKPOINT from unversioned docs

Signed-off-by: Matilda Clerke <matilda.clerke@consensys.net>

* Update docs/public-networks/how-to/bonsai-limit-trie-logs.md

Co-authored-by: Sally MacFarlane <macfarla.github@gmail.com>
Signed-off-by: Joan E <153745173+joaniefromtheblock@users.noreply.github.com>

---------

Signed-off-by: Matilda Clerke <matilda.clerke@consensys.net>
Signed-off-by: Joan E <153745173+joaniefromtheblock@users.noreply.github.com>
Co-authored-by: Joan E <153745173+joaniefromtheblock@users.noreply.github.com>
Co-authored-by: Sally MacFarlane <macfarla.github@gmail.com>

docs/public-networks/how-to/bonsai-limit-trie-logs.md

@@ -42,7 +42,7 @@ Before executing these example commands on your node, modify them to apply to yo
 1. Stop Besu.
 1. (Optional) Run the Besu trie log prune command. Specify the Bonsai Trie data storage format and the data directory for your Besu database:
  ```bash
- sudo /usr/local/bin/besu/bin/besu --data-storage-format=BONSAI --data-path=/var/lib/besu --sync-mode=X_SNAP storage trie-log prune
+ sudo /usr/local/bin/besu/bin/besu --data-storage-format=BONSAI --data-path=/var/lib/besu --sync-mode=SNAP storage trie-log prune
  ```
 1. Start Besu.
 1. Look for `Limit trie logs enabled: retention: 512; prune window: 30000` in your Besu configuration printout at startup.
@@ -198,8 +198,8 @@ You must shut down the Besu client before running the subcommand.
 - `java.lang.IllegalStateException: Unable to change the sync mode when snap sync is incomplete, please restart with snap sync mode`
 
 Check that you have specified `--sync-mode`. 
-The default is `--sync-mode=FAST`. 
-Most Mainnet users use `X_SNAP` or `X_CHECKPOINT`. 
+The default is `--sync-mode=SNAP`. 
+Most Mainnet users use `SNAP` or `CHECKPOINT`. 
 
 ### Cannot run trie log prune