iTerm2: update to 3.2.9

Changelog:
The only change in version 3.2.9 vs 3.2.8 is that it was built with
libssh2 1.8.2 because of a security vulnerability. iTerm2 version 3.2.8
was built with libssh2 1.8.0.

aqua/iTerm2/Portfile

@@ -12,11 +12,11 @@ if {[vercmp ${os.version} 17.0.0] < 0} {
         size    11969144
     patchfiles          patch-Makefile.diff
 } else {
-    version             3.2.8
+    version             3.2.9
     checksums \
-        rmd160  4e8b5378f184c3342964ed3e2e90144135bc3f44 \
-        sha256  2bf18d30c5e56e2433a1110be4f0ec1f42ad7e26862ac424e9706293ce45aabf \
-        size    11857802
+        rmd160  cf2e314a168a7d06214580dfb52433b1780cafab \
+        sha256  57f7910182a60e2c25827191e37a0db71f62732f51b42deae9efeb27e01847e1 \
+        size    11865387
     patchfiles          patch-Makefile-XC10.diff
 }