[release] CHANGELOG.md: mention the removal of 'port' support in dlv-dap

And fix the release date.

Change-Id: I86395b846ce70198dc4098cfac603fef4397dde5
Reviewed-on: https://go-review.googlesource.com/c/vscode-go/+/340829
Trust: Hyang-Ah Hana Kim <hyangah@gmail.com>
Run-TryBot: Hyang-Ah Hana Kim <hyangah@gmail.com>
TryBot-Result: kokoro <noreply+kokoro@google.com>
Reviewed-by: Suzy Mueller <suzmue@golang.org>

Author: hyangah

CHANGELOG.md

@@ -1,4 +1,4 @@
-## v0.27.0 - 8 Aug, 2021
+## v0.27.0 - 9 Aug, 2021
 
 📣 Delve's native DAP implementation ([`dlv-dap`](https://github.com/go-delve/delve/blob/master/Documentation/usage/dlv_dap.md))
 is enabled by default for local debugging. We updated the [Documentation for Debugging](https://github.com/golang/vscode-go/blob/master/docs/debugging.md)
@@ -22,7 +22,10 @@ command prints the build information of detected tools. <!-- CL 337989 -->
 - Debugging
     - Setting the `logOutput` property without `showLog: true` does not break debugging any more. <!-- CL 335029 -->
     - Fixed a bug in the legacy debug adapter that caused jumping at each step after upgrading to VS Code 1.58+. ([Issue 1617](https://github.com/golang/vscode-go/issues/1617), [1647](https://github.com/golang/vscode-go/issues/1647)) <!-- CL 338194 -->
-    - Fixed a bug that broke Attach mode debugging using the legacy debug adapter if `cwd` is not set. ([Issue 1608](https://github.com/golang/vscode-go/issues/1608)) <!-- CL 334111 --> 
+    - Fixed a bug that broke Attach mode debugging using the legacy debug adapter if `cwd` is not set. ([Issue 1608](https://github.com/golang/vscode-go/issues/1608)) <!-- CL 334111 -->
+    - Made the `dlv-dap` mode ignore the `port` property. It was initially suggested as a temporary alternative
+    to the remote debugging, but we decided to revisit the functionality for better remote debugging support.
+    Use the `debugServer` property if you want to connect to a manually launched `dlv dap` server. 
 
 ### Code Health
 - The version of `dlv-dap` is pinned to [v1.7.1-0.20210804080032-f95340ae1bf9](https://github.com/go-delve/delve/tree/f95340ae1bf9fed8740d5fd39f5758d41770d967) and `dlv-dap` is marked as a required tool.