Doc: Fix type of some storage parameters in CREATE TABLE page

autovacuum_vacuum_scale_factor and autovacuum_analyze_scale_factor have
been documented as "float4", but "floating type" is used in this case
for GUCs and relation options in the documentation.

Author: Atsushi Torikoshi
Discussion: https://postgr.es/m/CACZ0uYFf_p9BpbjLccx3CA=eM1Hk2Te=ULY4iptGLUhL-JxCPA@mail.gmail.com
Backpatch-through: 9.5

doc/src/sgml/ref/create_table.sgml

@@ -1461,7 +1461,7 @@ WITH ( MODULUS <replaceable class="parameter">numeric_literal</replaceable>, REM
    </varlistentry>
 
    <varlistentry id="reloption-autovacuum-vauum-scale-factor" xreflabel="autovacuum_vacuum_scale_factor">
-    <term><literal>autovacuum_vacuum_scale_factor</literal>, <literal>toast.autovacuum_vacuum_scale_factor</literal> (<type>float4</type>)
+    <term><literal>autovacuum_vacuum_scale_factor</literal>, <literal>toast.autovacuum_vacuum_scale_factor</literal> (<type>floating point</type>)
     <indexterm>
      <primary><varname>autovacuum_vacuum_scale_factor</varname> </primary>
      <secondary>storage parameter</secondary>
@@ -1491,7 +1491,7 @@ WITH ( MODULUS <replaceable class="parameter">numeric_literal</replaceable>, REM
    </varlistentry>
 
    <varlistentry id="reloption-autovacuum-analyze-scale-factor" xreflabel="autovacuum_analyze_scale_factor">
-    <term><literal>autovacuum_analyze_scale_factor</literal> (<type>float4</type>)
+    <term><literal>autovacuum_analyze_scale_factor</literal> (<type>floating point</type>)
     <indexterm>
      <primary><varname>autovacuum_analyze_scale_factor</varname></primary>
      <secondary>storage parameter</secondary>