[meld] Update pre-commit config to accept any Python 3 version

[Kai Willadsen <kaiw src gnome org>]

commit 0fdc1f543908315982e762f77ed5c01f3daa2c3b
Author: Kai Willadsen <kai willadsen gmail com>
Date:   Sun May 17 08:47:41 2020 +1000

    Update pre-commit config to accept any Python 3 version
    
    This isn't really accurate, since we require at least 3.6. However, the
    current GNOME image has 3.8 installed while some development happens on
    (at least) 3.7, so this is the easiest accommodation.

 .pre-commit-config.yaml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index be45a6f3..7238b0a5 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -1,5 +1,5 @@
 default_language_version:
-    python: python3.7
+    python: python3
 
 repos: