Merge bitcoin/bitcoin#25298: doc: Fix command in "OpenBSD Build Guide"

b1f662b doc: Fix command in "OpenBSD Build Guide" (Hennadii Stepanov)

Pull request description:

  Fixed `pkg_add sqlite3` command.

ACKs for top commit:
  theStack:
    ACK b1f662b

Tree-SHA512: b1dd1baa238f76dadfb188b46bc72f993cc88ea4651cf0836cd85348429baa15228e9cd4c15e588675c9f340692118952302a8629f45d7dc275cc086917c11ca

Author: MacroFake

doc/build-openbsd.md

@@ -34,7 +34,7 @@ It is not necessary to build wallet functionality to run either `bitcoind` or `b
 `sqlite3` is required to support [descriptor wallets](descriptors.md).
 
 ``` bash
-pkg_add install sqlite3
+pkg_add sqlite3
 ```
 
 ###### Legacy Wallet Support