[gimp-help] Add missing precision help ids

[Jacob Boerema <jboerema src gnome org>]

commit 05b855d51d825c849b69ac811c66d5b897efb9c9
Author: Jacob Boerema <jgboerema gmail com>
Date:   Mon Sep 26 21:36:58 2022 -0400

    Add missing precision help ids
    
    (cherry picked from commit 9fd781c826c8cb5a9fe504d1ac3d00b26ea9718a)

 src/menus/image/precision.xml | 6 ++++++
 1 file changed, 6 insertions(+)
---
diff --git a/src/menus/image/precision.xml b/src/menus/image/precision.xml
index 5eb6a75d8..4cc80a8aa 100644
--- a/src/menus/image/precision.xml
+++ b/src/menus/image/precision.xml
@@ -68,16 +68,19 @@
               <itemizedlist>
                 <title>Integer Precision Options</title>
                 <listitem>
+                  <anchor id="gimp-image-convert-u8"/>
                   <para>
                     <guimenuitem>8-bit integer</guimenuitem>
                   </para>
                 </listitem>
                 <listitem>
+                  <anchor id="gimp-image-convert-u16"/>
                   <para>
                     <guimenuitem>16-bit integer</guimenuitem>
                   </para>
                 </listitem>
                 <listitem>
+                  <anchor id="gimp-image-convert-u32"/>
                   <para>
                     <guimenuitem>32-bit integer</guimenuitem>
                   </para>
@@ -88,11 +91,13 @@
               <itemizedlist>
                 <title>Floating point precision options</title>
                 <listitem>
+                  <anchor id="gimp-image-convert-half"/>
                   <para>
                     <guimenuitem>16-bit floating point</guimenuitem>
                   </para>
                 </listitem>
                 <listitem>
+                  <anchor id="gimp-image-convert-float"/>
                   <para>
                     <guimenuitem>32-bit floating point</guimenuitem>
                   </para>
@@ -106,6 +111,7 @@
       <varlistentry>
         <term>Channel Encoding Options</term>
         <listitem>
+          <anchor id="gimp-image-convert-gamma"/>
           <para>
             The Precision menu also allows you to choose a
             <link linkend="glossary-channel-encoding">channel encoding</link>