_content/doc/go1.24: fix meaning of -u in 'go get -u tool'

It's a common misperception that -u is needed more often than it is,
perhaps in part due to muscle memory from the GOPATH days.

The current release notes suggest that 'go get -u tool' will upgrade all
of the current module's tools, but it does more than that -- it will
also upgrade all of the direct and indirect non-test dependencies of
those tools too.

The simplest fix is probably just to remove the -u from this section of
the release notes.

There are various other details that could be covered, like the -u or -t
flags, or that 'go get tool' is a shorthand for 'go get tool@upgrade',
but maybe this is sufficient.

Updates golang/go#48429
Updates golang/go#68545

Change-Id: I31eeb96dae996a7ffde24d9bae6788d6889e2044
Reviewed-on: https://go-review.googlesource.com/c/website/+/638296
Reviewed-by: David Chase <[email protected]>
Reviewed-by: Dmitri Shuralyov <[email protected]>
Auto-Submit: Dmitri Shuralyov <[email protected]>
Reviewed-by: Dmitri Shuralyov <[email protected]>
LUCI-TryBot-Result: Go LUCI <[email protected]>
Reviewed-by: Conrad Irwin <[email protected]>

Author: thepudds

_content/doc/go1.24.md

@@ -44,7 +44,7 @@ The new `-tool` flag for `go get` causes a tool directive to be added to the
 current module for named packages in addition to adding require directives.
 
 The new [`tool` meta-pattern](/cmd/go#hdr-Package_lists_and_patterns) refers to
-all tools in the current module. This can be used to upgrade them all with `go get -u tool` or to install them into your GOBIN directory with `go install tool`.
+all tools in the current module. This can be used to upgrade them all with `go get tool` or to install them into your GOBIN directory with `go install tool`.
 
 <!-- go.dev/issue/69290 -->