Adding copy buttons to code blocks.

Making the code blocks copyable.

Signed-off-by: Bill Traynor <[email protected]>

readme.adoc

@@ -25,12 +25,15 @@ To build the document, you'll need the following tools installed on your system:
 * Docker
 
 === Cloning the Repository
-
-`git clone --recurse-submodules https://github.com/riscv/docs-spec-template.git`
-
+```
+git clone --recurse-submodules https://github.com/riscv/docs-spec-template.git
+```
 === Building the Documentation
 
-To start the build process, run `cd ./docs-spec-template && make build`.
+To start the build process, run:
+```
+cd ./docs-spec-template && make build
+```
 
 The Makefile script will check the availability of Docker on your system:
 
@@ -43,4 +46,8 @@ The build process utilizes several options, including theming and font settings,
 
 === Cleaning up
 
-To clean up the generated files, run `make clean`. This will remove the generated PDF file.
+To clean up the generated files, run:
+```
+make clean
+```
+This will remove the generated PDF file.