Edited ch03_bitcoin-core.adoc with Atlas code editor

ch03_bitcoin-core.adoc

@@ -136,7 +136,7 @@ $ cd bitcoin
 
 By default,((("Bitcoin Core", "compiling from source code", "selecting release version", id="bitcoin-core-compile-release")))((("compiling", "Bitcoin Core from source code", "selecting release version", id="compile-bitcoin-core-release")))((("source code", "compiling Bitcoin Core", "selecting release version", id="source-code-compile-release")))((("release version (Bitcoin Core)", "selecting", id="release-select")))((("selecting", "release version (Bitcoin Core)", id="select-release"))) the local copy will be synchronized with the
 most recent code, which might be an unstable or beta version of Bitcoin.
-Before compiling the code, select a specific version by checking out a
+Before compiling the code, select a specific version by checking out ((("tags")))a
 release _tag_. This will synchronize the local copy with a specific
 snapshot of the code repository identified by a keyword tag. Tags are
 used by the developers to mark specific releases of the code by version