chore(deps): bump squidfunk/mkdocs-material from c373999 to 868ad4d in /docs (#5119)

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Stefano Vozza <[email protected]>

Author: dependabot[bot]

docs/Dockerfile

@@ -1,5 +1,5 @@
 # version 9.5.35
-FROM squidfunk/mkdocs-material@sha256:c3739993c3e7c92cfe649ba03cbc04f4fa9b1497886abd16267eb413cda8aecf
+FROM squidfunk/mkdocs-material@sha256:868ad4d39fb5865b72d00173ade00f4eae2b38dde7ff790a011cc44ce4a8ff8e
 
 # Install Node.js
 RUN apk add --no-cache nodejs=22.13.1-r0 npm