Update self-hosted changelog: v0.116.19 (#6010)

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

Author: thesandlord

fern/products/docs/pages/self-hosted/changelog/2026-06-28.mdx

@@ -0,0 +1,7 @@
+### v0.116.19
+
+```dockerfile
+FROM fernenterprise/fern-self-hosted:0.116.19
+```
+
+Digest: `sha256:bcd6c73f1554028842840aa05e257fdfe763b1c61f30bc5806c4702e39140a6c`