chore: bump source-commit for ubuntu-desktop-bootstrap (#1343)

Updates the `source-commit` for `ubuntu-bootstrap` in the snapcraft.yaml
from 788a85b to
9415a7f
([diff](788a85b...9415a7f))

Author: d-loose

snap/snapcraft.yaml

@@ -63,7 +63,7 @@ parts:
     after: [flutter-git]
     plugin: nil
     source: .
-    source-commit: &commit-ref 788a85ba653085431cb17510a3674cb2a7c5f89d
+    source-commit: &commit-ref 9415a7f979c90e6c614bc3ad77090ec1ad02cfe9
     source-type: git
     build-attributes: [enable-patchelf]
     stage-packages:
@@ -92,7 +92,7 @@ parts:
     plugin: nil
     source: https://github.com/canonical/curtin
     source-type: git
-    source-commit: 3a1f14bb7579f972a68bafdae309ac474c73170a
+    source-commit: 44ea7006de0b955e2de294b0ec9d81968078da36
     override-pull: |
       craftctl default
       # Since snapcraft 8.14, the tags are not automatically fetched
@@ -118,7 +118,7 @@ parts:
     plugin: nil
     source: https://github.com/canonical/probert.git
     source-type: git
-    source-commit: 4929e5f9052517b073b54ec5d4e607186d4e2561
+    source-commit: 4d33326e480fa61576667ac6d0819592877811bd
     override-build: *pyinstall
     build-packages:
       - build-essential