Bug 21260: (follow-up) Fix typo in holdingbranch segment

Copy-and-paste error. We need holdingbranch here.

Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: ava li <rubyli208@gmail.com>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>

Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>

koha-tmpl/opac-tmpl/bootstrap/en/xslt/MARC21slim2OPACResults.xsl

@@ -1304,7 +1304,7 @@
                                        <xsl:if test="items:itemcallnumber != '' and items:itemcallnumber and $OPACItemLocation='callnum'">
                                            <span class="CallNumberAndLabel">
                                                 <span class="LabelCallNumber">Call number: </span>
-                                                <span class="CallNumber"><xsl:value-of select="items:itemcallnumber"/><xsl:if test="count(key('item-by-status-and-branch-home', concat(items:status, ' ', items:homebranch)))>1"><xsl:text>, ..</xsl:text></xsl:if></span>
+                                                <span class="CallNumber"><xsl:value-of select="items:itemcallnumber"/><xsl:if test="count(key('item-by-status-and-branch-holding', concat(items:status, ' ', items:holdingbranch)))>1"><xsl:text>, ..</xsl:text></xsl:if></span>
                                            </span>
                                        </xsl:if>
                                        <xsl:choose>