Update RGBDS master documentation

Author: GitHub Action

docs/gbz80.7.pdf

@@ -637,10 +637,18 @@ <h3 class="Ss" id="RPN_expressions"><a class="permalink" href="#RPN_expressions"
   <tr id="$61">
     <td><a class="permalink" href="#$61"><code class="Li">$61</code></a></td>
     <td>&#x2018;<code class="Li">rst</code>&#x2019; check. Checks if the value
-      is a valid &#x2018;<code class="Li">rst</code>&#x2019; (see &#x201C;RST
-      vec&#x201D; in <a class="Xr" href="./gbz80.7">gbz80(7)</a>) vector, that
-      is one of $00, $08, $10, $18, $20, $28, $30, or $38. The value is then
-      ORed with $C7 (&#x2018;<code class="Li">| $C7</code>&#x2019;).</td>
+      is a valid &#x2018;<code class="Li">rst</code>&#x2019; vector (see
+      &#x201C;RST vec&#x201D; in <a class="Xr" href="./gbz80.7">gbz80(7)</a>),
+      that is, one of $00, $08, $10, $18, $20, $28, $30, or $38. The value is
+      then ORed with $C7 (&#x2018;<code class="Li">| $C7</code>&#x2019;).</td>
+  </tr>
+  <tr id="$62">
+    <td><a class="permalink" href="#$62"><code class="Li">$62</code></a></td>
+    <td>&#x2018;<code class="Li">bit/res/set</code>&#x2019; check; followed by
+      the instruction's <code class="Cm">BYTE</code> mask. Checks if the value
+      is a valid bit index (see e.g. &#x201C;BIT u3, r8&#x201D; in
+      <a class="Xr" href="./gbz80.7">gbz80(7)</a>), that is, from 0 to 7. The
+      value is then ORed with the instruction's mask.</td>
   </tr>
   <tr id="$80">
     <td><a class="permalink" href="#$80"><code class="Li">$80</code></a></td>