[Update]JISplite89 Readme and LED nums (#9554)

1.Update the URL and photos in the build guide.
2.Changed the number of LEDs.

keyboards/jisplit89/readme.md

@@ -1,6 +1,6 @@
 # JISplit89
 
-![jisplit89](https://s2.booth.pm/1d33594d-0c5f-4f93-baf5-2e89e0d99afc/i/1916810/82322b65-7867-4779-b7f4-9076530d9e33_base_resized.jpg)
+![jisplit89](https://s2.booth.pm/1d33594d-0c5f-4f93-baf5-2e89e0d99afc/i/1916810/ee9743ff-b03d-4ab8-8130-ddaad3c1b30d_base_resized.jpg)
 
 This is 89 keys Custom keyboard.
 
@@ -14,4 +14,4 @@ Make example for this keyboard (after setting up your build environment):
 
 See the [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) and the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) for more information. Brand new to QMK? Start with our [Complete Newbs Guide](https://docs.qmk.fm/#/newbs).
 
-[Build guide](https://salicylic-acid3.hatenablog.com/entry/7skb-mx-build-guide)(See here because it is almost the same as 7sKB)
+[Build guide](https://salicylic-acid3.hatenablog.com/entry/jisplit89-build-guide)

keyboards/jisplit89/rev1/config.h

@@ -51,9 +51,9 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define RGB_DI_PIN D3
 
 #ifndef RGBLED_NUM
-  #define RGBLED_NUM 31
+  #define RGBLED_NUM 32
   #define RGBLIGHT_SPLIT
-  #define RGBLED_SPLIT { 11, 20 }
+  #define RGBLED_SPLIT { 11, 21 }
 #endif
 
 #define RGBLIGHT_ANIMATIONS