fix(deps): update dependency fumadocs-core to v15.7.6

Author: renovate[bot]

package.json

@@ -25,7 +25,7 @@
     "@types/jsdom": "^21.1.7",
     "class-variance-authority": "^0.7.1",
     "clsx": "^2.1.1",
-    "fumadocs-core": "15.6.12",
+    "fumadocs-core": "15.7.6",
     "fumadocs-mdx": "11.8.1",
     "fumadocs-ui": "15.6.12",
     "jsdom": "^26.1.0",