[gnome-calculator] help: Update keyboard page to 3.38

[Robert Roth <robertroth src gnome org>]

commit 96f328a1625ae9c335b1bce59f8d047140a5c122
Author: Pranali Deshmukh <pranali21293 gmail com>
Date:   Mon Oct 12 18:44:01 2020 +0100

    help: Update keyboard page to 3.38
    
    Add subscript link to the keyboard page.
    
    Ref: #185

 help/C/keyboard.page | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)
---
diff --git a/help/C/keyboard.page b/help/C/keyboard.page
index a5222010..c646978a 100644
--- a/help/C/keyboard.page
+++ b/help/C/keyboard.page
@@ -4,6 +4,12 @@
 
     <info>
         <link type="guide" xref="index#ui"/>
+        <revision pkgversion="3.38.0" date="2020-09-25" status="review"/>
+        <credit type="editor">
+          <name>Pranali Deshmukh</name>
+          <email>pranali21293 gmail com</email>
+          <years>2020</years>
+        </credit>
     </info>
 
        <title>Using the Keyboard</title>
@@ -37,6 +43,6 @@
     </tr>
     </table>
     <p>
-    To enter <link xref="superscript">superscript numbers</link> use <keyseq><key>Ctrl</key>number</keyseq>, 
for subscript use <keyseq><key>Alt</key>number</keyseq>.
+    To enter <link xref="superscript">superscript numbers</link> use <keyseq><key>Ctrl</key>number</keyseq>, 
for <link xref="superscript">subscript numbers</link> use <keyseq><key>Alt</key>number</keyseq>.
     </p>
 </page>