update README.md with instructions on installing or creating sdebs

Signed-off-by: jeffmerkey <jeffmerkey@gmail.com>

README

@@ -180,8 +180,8 @@ top directory)_
 One item of note is that SDEB packages are actually just tar.gz archives
 renamed with an .sdeb file extension with the files organized into a
 SPECS and SOURCES directory tree structure. Subsequently, an SDEB can
-also be extracted and installed with the _tar -xvf command_ or the files
-listed with the _tar -tvf command_:
+also be extracted and installed with the TAR -XVF COMMAND or the files
+listed with the TAR -TVF COMMAND:
 
     [root@localhost getssl]# tar -tvf /root/debbuild/SDEBS/getssl-2.47-1.sdeb 
     -rw-r--r-- root/root   1772110 2022-10-12 20:42 SOURCES/getssl-2.47.tar.gz

README.md

@@ -158,7 +158,7 @@ debbuild -i getssl-2.47-1.sdeb
 ```
 *(Note: Debbuild installs the source code files in /root/debbuild/ as top directory)*
 
-One item of note is that SDEB packages are actually just tar.gz archives renamed with an .sdeb file extension with the files organized into a SPECS and SOURCES directory tree structure.  Subsequently, an SDEB can also be extracted and installed with the *tar -xvf command* or the files listed with the *tar -tvf command*:
+One item of note is that SDEB packages are actually just tar.gz archives renamed with an .sdeb file extension with the files organized into a SPECS and SOURCES directory tree structure.  Subsequently, an SDEB can also be extracted and installed with the **tar -xvf command** or the files listed with the **tar -tvf command**:
 
 ```sh
 [root@localhost getssl]# tar -tvf /root/debbuild/SDEBS/getssl-2.47-1.sdeb