ci: Force ccache package version for MSVC build

[hebasto]

The recent update of the ccache package from 4.6.1 to 4.6.2 broke our MSVC CI build.

This PR forces the working version 4.6.1.

[fanquake]

What about the point update actually broke things? Has it been reported upstream?

[hebasto]

What about the point update actually broke things? Has it been reported upstream?

Checking the https://github.com/ccache/ccache repository...

cc @sipsorcery

[sipsorcery]

ACK 905f614.

[hebasto]

What about the point update actually broke things? Has it been reported upstream?

Checking the https://github.com/ccache/ccache repository...

git log --oneline v4.6.1..v4.6.2 shows nothing suspicious...

[hebasto]

@MarcoFalke

As all caches (Qt, vcpkg tools, vcpkg binary, ccache) have been invalidated, a couple of minutes lacks to finish a build before timeout.

Do you mind increasing CPU number:

--- a/.cirrus.yml
+++ b/.cirrus.yml
@@ -97,8 +97,8 @@ task:
   name: "Win64 native [vs2022]"
   << : *FILTER_TEMPLATE
   windows_container:
-    cpu: 4
-    memory: 8G
+    cpu: 6
+    memory: 12G
     image: cirrusci/windowsservercore:visualstudio2022
   timeout_in: 120m
   env:

?

[hebasto]

What about the point update actually broke things? Has it been reported upstream?

It has been fixed in v4.6.3 (tested in my Cirrus account).

This PR forces the working version 4.6.1.

Nevertheless, I'd prefer to stick to well-known v4.6.1 for now.