patch 9.1.0486: filetype: Snakemake files are not recognized

Problem:  filetype: Snakemake files are not recognized
Solution: Detect '*.smk' and Snakefile files as snakemake filetype
          (Riley Bruins)

See:
https://snakemake.readthedocs.io/en/stable/snakefiles/deployment.html#distribution-and-reproducibility

closes: #14992

Co-authored-by: zeertzjq <zeertzjq@outlook.com>
Signed-off-by: Riley Bruins <ribru17@hotmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/.github/MAINTAINERS b/.github/MAINTAINERS
index 926dc07..1254782 100644
--- a/.github/MAINTAINERS
+++ b/.github/MAINTAINERS
@@ -225,6 +225,7 @@
 runtime/ftplugin/sed.vim		@dkearns
 runtime/ftplugin/sh.vim			@dkearns
 runtime/ftplugin/slint.vim		@ribru17
+runtime/ftplugin/snakemake.vim		@ribru17
 runtime/ftplugin/solidity.vim		@cothi
 runtime/ftplugin/solution.vim		@dkearns
 runtime/ftplugin/spec.vim		@ignatenkobrain