[Keyboard] Fix file encoding and add readme (#5853)

keyboards/yosino58/readme.md

@@ -0,0 +1,16 @@
+# yosino58
+
+![yosino58](https://booth.pximg.net/4b06a4ec-3a3f-49c5-a9b2-46aa086c82b0/i/1278362/5596aecd-418d-4f28-be64-d8344db22e72_base_resized.jpg)
+
+yosino58 is a 58-key, Column-Staggered split keyboard.
+Compatible with Cherry MX and Kailh low profile switches. Optional support for OLED and Backlight LED.
+
+Keyboard Maintainer: [sakurachari](https://github.com/sakurachari)  
+Hardware Supported: yosino58  
+Hardware Availability: https://booth.pm/ja/items/1278362
+
+Make example for this keyboard (after setting up your build environment):
+
+    make yosino58:default
+
+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).

keyboards/yosino58/rev1/config.h

@@ -24,7 +24,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define DEVICE_VER      0x0001
 #define MANUFACTURER    sakuranbo0046
 #define PRODUCT         yosino58
-#define DESCRIPTION     yosino58 is 6<EFBFBD>~4+5keys column-staggered split keyboard.
+#define DESCRIPTION     yosino58 is 6x4+5keys column-staggered split keyboard.
 
 /* key matrix size */
 // Rows are doubled-up