chore(developer): codesigning sporadic failure

https://build.palaso.org/buildConfiguration/Keyman_Developer_Test/479262?buildTab=log&linesState=479.7823.7827.7831&logView=flowAware&focusLine=7883

```
13:26:04  [developer/src/server] ### visual_studio: cmd //c /c/BuildAgent/work/7ac43416c45637e9/keyman/common/windows/signtime.bat /c/Program Files (x86)/Windows Kits/10/bin/10.0.17763.0/x64/signtool.exe c:The following certificate was selected:
13:26:04  Issued to: SUMMER INSTITUTE OF LINGUISTICS, INC.
13:26:04 
13:26:04  Issued by: Sectigo Public Code Signing CA EV R36
13:26:04 
13:26:04  Expires: Thu Sep 17 19:59:59 2026
13:26:04 
13:26:04  SHA1 hash: E9E33765A2C871D4FE730592CCA624D07DFC11CC
13:26:04 
13:26:04  Done Adding Additional Store
13:26:04  Successfully signed: C:/BuildAgent/work/7ac43416c45637e9/keyman/developer/bin/server/build/src/win32/trayicon/addon.node
13:26:04 
13:26:04 
13:26:04  Number of files successfully Signed: 1
13:26:04 
13:26:04  Number of warnings: 0
13:26:04 
13:26:04  Number of errors: 0
13:26:04 
13:26:05  engine "pkcs11" set.
13:26:09  SignTool Error: The file cannot be mapped into memory. It may be zero size.
13:26:09 
13:26:09  Number of files successfully Signed: 0
13:26:09  SignTool Error: An error occurred while attempting to sign: C:/BuildAgent/work/7ac43416c45637e9/keyman/developer/bin/server/build/src/win32/trayicon/addon.node
```