releaser: Add release notes to /docs for release of 0.88.1

[ci skip]

Author: bep

docs/content/en/news/0.88.1-relnotes/index.md

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+
+---
+date: 2021-09-04
+title: "Hugo 0.88.1: A couple of Bug Fixes"
+description: "This version fixes a couple of bugs introduced in 0.88.0."
+categories: ["Releases"]
+images:
+- images/blog/hugo-bug-poster.png
+
+---
+
+	
+
+This is a bug-fix release with one important fix.
+
+* Bump down again to Go 1.16.7 for the release builds [e1ead4db](https://github.com/gohugoio/hugo/commit/e1ead4dbca4cfb00ec0893c8c8563c91624ecca7) [@bep](https://github.com/bep) [#8952](https://github.com/gohugoio/hugo/issues/8952)[#8955](https://github.com/gohugoio/hugo/issues/8955)
+
+
+