Update self-hosted changelog: v0.115.5 (#5634)

Co-authored-by: thesandlord <8902396+thesandlord@users.noreply.github.com>

Author: fern-support

fern/products/docs/pages/self-hosted/changelog/2026-05-28.mdx

@@ -0,0 +1,7 @@
+### v0.115.5
+
+```dockerfile
+FROM fernenterprise/fern-self-hosted:0.115.5
+```
+
+Digest: `sha256:5c7f6f5db92aad29ee848ef868841461457c3d633bb2241f677b3338109e4d9d`