Update HSR weapon banner rates

Author: Tibowl

pages/tools/gachacalc.tsx

@@ -165,7 +165,7 @@ const gachas: Record<string, Banner> = {
   },
   charHSR: {
     bannerName: "5* banner character [Honkai: Star Rail]",
-    banner: 0.5 + (0.5 * 1) / 8,
+    banner: 0.5 + 0.5 / 8,
     guaranteed: 1,
     canGuarantee: true,
     minConst: -1,
@@ -177,7 +177,7 @@ const gachas: Record<string, Banner> = {
   },
   weaponHSR: {
     bannerName: "5* banner weapon [Honkai: Star Rail]",
-    banner: 0.75,
+    banner: 0.75 + 0.25 / 8,
     guaranteed: 1,
     canGuarantee: true,
     minConst: 0,