docs: update signing key

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

Author: zx2c4

docs/buildrun.md

@@ -60,8 +60,8 @@ C:\Projects\wireguard-windows\installer> build
 Add a file called `sign.bat` in the root of this repository with these contents, or similar:
 
 ```text
-set SigningProvider=/sha1 8BC932FDFF15B892E8364C49B383210810E4709D
-set TimestampServer=http://timestamp.entrust.net/rfc3161ts2
+set SigningProvider=/sha1 1b3afa5e2a76bb51f00020002dccadb165689c33
+set TimestampServer=http://timestamp.digicert.com
 ```
 
 After, run the above `build` commands as usual, from a shell that has [`signtool.exe`](https://docs.microsoft.com/en-us/windows/desktop/SecCrypto/signtool) in its `PATH`, such as the Visual Studio 2017 command prompt.

installer/fetcher/Makefile

@@ -35,7 +35,7 @@ deploy: $(TARGET)
 
 sign: deploy
 	ssh $(DEPLOYMENT_HOST) '"C:\Program Files (x86)\Windows Kits\10\App Certification Kit\signtool.exe"' sign /sha1 $(SIGNING_CERTIFICATE) /fd sha256 /tr $(TIMESTAMP_SERVER) /td sha256 /d '"WireGuard Installer"' '$(DEPLOYMENT_PATH)\$(TARGET)'
-	scp -T '$(DEPLOYMENT_HOST):$(DEPLOYMENT_PATH)\$(TARGET)' .
+	scp -T '$(DEPLOYMENT_HOST):$(DEPLOYMENT_PATH)/$(TARGET)' .
 
 .PHONY: clean deploy sign