Replace word-break: break-word with overflow-wrap

According to W3C documentation [1]:

> For compatibility with legacy content, the word-break property also
> supports a deprecated break-word keyword. When specified, this has the
> same effect as word-break: normal and overflow-wrap: anywhere,
> regardless of the actual value of the overflow-wrap property.

This is currently *not* detected by the `property-no-deprecated`
stylelint rule. However, since this rule detects other places where we
should use `overflow-wrap`, we're changing it as part of the same pull
request.

Note that, as of November 2025, 98.22% of the browsers support
`overflow-wrap: anywhere`. We're still making this change because we
only use this property in two specific places and it isn't very likely
that long words will really be a problem with the remaining 1.78%.

By the way, I'm not sure why we use this property in the budget
invesment show paragraphs and not in other similar places. It was
introduced in commit e3878ff43, alongside other changes which don't seem
to be related. When in doubt, we leave things as they were, so we're
doing the same thing here.

[1] https://www.w3.org/TR/css-text-3/#word-break-property
[2] https://caniuse.com/mdn-css_properties_overflow-wrap_anywhere

app/assets/stylesheets/admin/polls/questions/options/table.scss

@@ -7,7 +7,7 @@
     }
 
     &.description {
-      word-break: break-word;
+      overflow-wrap: anywhere;
     }
   }
 

app/assets/stylesheets/participation.scss

@@ -316,7 +316,7 @@
 }
 
 .budget-investment-show p {
-  word-break: break-word;
+  overflow-wrap: anywhere;
 }
 
 .proposal-show,