Merge bitcoin/bitcoin#33573: doc: bump the template macOS version

f6567527d8 doc: bump the template macOS version (kevkevinpal)

Pull request description:

  Motivated by https://github.com/bitcoin/bitcoin/pull/33489#issuecomment-3361601497

  The minimum version of MacOS for this repo is now 14 and above so it makes sense to update the issue template to reflect that.
  We are now using a higher version but since it is just a bug template, there is no need to put the lowest version we support.

ACKs for top commit:
  maflcko:
    lgtm ACK f6567527d8
  l0rinc:
    ACK f6567527d8
  janb84:
    ACK f6567527d8

Tree-SHA512: 701b161bda25245996c94b6d2119b5cc85a34917551dcf8c92ffacf3aa80fa7fe84bb3497edc7e600c5b2443de13a6f6107fc7289721e585b16c4972d07a796c

.github/ISSUE_TEMPLATE/bug.yml

@@ -78,7 +78,7 @@ body:
     id: os
     attributes:
       label: Operating system and version
-      placeholder: e.g. "MacOS Ventura 13.2" or "Ubuntu 22.04 LTS"
+      placeholder: e.g. "MacOS 26.0" or "Ubuntu 26.04 LTS"
     validations:
       required: true
   - type: textarea
@@ -90,4 +90,3 @@ body:
         e.g. OS/CPU and disk type, network connectivity
     validations:
       required: false
-