package/libmicrohttpd: bump version to 0.9.75

Release notes:
https://lists.gnu.org/archive/html/libmicrohttpd/2021-12/msg00052.html
https://lists.gnu.org/archive/html/libmicrohttpd/2021-12/msg00056.html

Changelog:
https://git.gnunet.org/libmicrohttpd.git/tree/ChangeLog

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/libmicrohttpd/libmicrohttpd.hash

@@ -1,3 +1,3 @@
 # Locally calculated
-sha256  a37b2f1b88fd1bfe74109586be463a434d34e773530fc2a74364cfcf734c032e  libmicrohttpd-0.9.73.tar.gz
+sha256  9278907a6f571b391aab9644fd646a5108ed97311ec66f6359cebbedb0a4e3bb  libmicrohttpd-0.9.75.tar.gz
 sha256  7399547209438c93f9b90297954698773d4846cea44cde5ca982c84c45952a3b  COPYING

package/libmicrohttpd/libmicrohttpd.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-LIBMICROHTTPD_VERSION = 0.9.73
+LIBMICROHTTPD_VERSION = 0.9.75
 LIBMICROHTTPD_SITE = $(BR2_GNU_MIRROR)/libmicrohttpd
 LIBMICROHTTPD_LICENSE_FILES = COPYING
 LIBMICROHTTPD_CPE_ID_VENDOR = gnu