Upgrade Hugo to 0.117.0

[chalin]

The only changes in the generated files are minor: they have to do with syntax highlighting (styling correction):

$ git diff -bw --ignore-blank-lines -I "Hugo 0.11" | grep ^diff | grep -v \.xml | grep -v site
diff --git a/blog/2022/exponential-histograms/index.html b/blog/2022/exponential-histograms/index.html
diff --git a/docs/demo/services/ad/index.html b/docs/demo/services/ad/index.html
diff --git a/docs/instrumentation/java/getting-started/index.html b/docs/instrumentation/java/getting-started/index.html
diff --git a/docs/instrumentation/java/manual/index.html b/docs/instrumentation/java/manual/index.html
$ git diff -bw --ignore-blank-lines -I "Hugo 0.11" -I "display:flex" | grep ^diff | grep -v \.xml | grep -v site
$