update documentation

README.html

@@ -331,6 +331,9 @@ xprompt</li>
 to avoid adding more external dependencies unless it’s a common
 dependency most people already have.</li>
 </ul></li>
+<li>Deprecate: build.sh script. It’s not really necessary now that we’re
+using Meson for building anyway. Will probably be completely removed
+along with the <code>IMG:</code> syntax in spmenu 2.0.</li>
 </ul>
 <h3
 id="unlikely-but-maybe-at-some-point-in-the-distant-future">Unlikely,

README.md

@@ -134,6 +134,9 @@ skip over images after a set time limit.
   - Probably use some minimal public domain library for this, I'd
 like to avoid adding more external dependencies unless it's a
 common dependency most people already have.
+- Deprecate: build.sh script. It's not really necessary now that we're
+using Meson for building anyway. Will probably be completely removed
+along with the `IMG:` syntax in spmenu 2.0.
 
 ### Unlikely, but maybe at some point in the distant future