scripted-diff: replace ⛰ emoji with $ [skip ci]

-BEGIN VERIFY SCRIPT-
sed -i 's/⛰/$/g' $(git grep -l '⛰')
-END VERIFY SCRIPT-

docs/MAKEFILE.md

@@ -4,9 +4,9 @@ Makefile
 To build, verify, and install `lnd` from source, use the following
 commands:
 ```shell
-⛰  make
-⛰  make check
-⛰  make install
+$  make
+$  make check
+$  make install
 ```
 
 The command `make check` requires `bitcoind` (almost any version should do) to
@@ -144,7 +144,7 @@ until an error occurs. Useful for hunting flakes.
 
 Example:
 ```shell
-⛰  make flakehunter-parallel icase='(data_loss_protection|channel_backup)' backend=neutrino
+$  make flakehunter-parallel icase='(data_loss_protection|channel_backup)' backend=neutrino
 ```
 
 `lint`