doc: deprecate use of static buffers for JITTARGET

Author: carenas

doc/pcre2api.3

@@ -1,4 +1,4 @@
-.TH PCRE2API 3 "19 October 2025" "PCRE2 10.48-DEV"
+.TH PCRE2API 3 "29 October 2025" "PCRE2 10.48-DEV"
 .SH NAME
 PCRE2 - Perl-compatible regular expressions (revised API)
 .sp
@@ -1297,13 +1297,14 @@ documentation for more details.
   PCRE2_CONFIG_JITTARGET
 .sp
 The \fIwhere\fP argument should point to a buffer that is suitably aligned and
-at least 128 code units long. (The exact length required can be found by calling
-\fBpcre2_config()\fP with \fBwhere\fP set to NULL.) The buffer is filled with a
-string that contains the name of the architecture for which the JIT compiler is
-configured, for example "x86 32bit (little endian + unaligned)". If JIT support
-is not available, PCRE2_ERROR_BADOPTION is returned, otherwise the number of
-code units used is returned. This is the length of the string, plus one unit
-for the terminating zero.
+wide enough to hold the full string. The exact length required is returned when
+calling \fBpcre2_config()\fP with \fBwhere\fP set to NULL first. The buffer is
+filled with a string that contains the name of the architecture for which the JIT
+compiler is configured at build time, for example, a 64-bit ARM CPU that supports
+the Armv8.1 extension writes "ARM-64 (LSE) 64bit (little endian + unaligned)".
+If JIT support is not available, PCRE2_ERROR_BADOPTION is returned, otherwise
+the number of code units used is returned. This is the length of the string,
+plus one code unit for the NUL character.
 .sp
   PCRE2_CONFIG_LINKSIZE
 .sp
@@ -4606,6 +4607,6 @@ Cambridge, England.
 .rs
 .sp
 .nf
-Last updated: 19 October 2025
+Last updated: 29 October 2025
 Copyright (c) 1997-2024 University of Cambridge.
 .fi