patch 9.1.1775: filetype: Mamba configuration files are not recognized

Problem:  filetype: Mamba configuration files are not recognized
Solution: Detect .mambarc and mambarc as yaml filetype (Samuel Huang).

References:
- https://mamba.readthedocs.io/en/latest/user_guide/configuration.html

closes: #18338

Signed-off-by: Samuel Huang <hi@sgh.ng>
Signed-off-by: Christian Brabandt <cb@256bit.org>

runtime/filetype.vim

@@ -630,6 +630,9 @@ au BufNewFile,BufRead lynx.cfg			setf lynx
 " LyRiCs
 au BufNewFile,BufRead *.lrc			setf lyrics
 
+" Mamba configuration file
+au BufNewFile,BufRead .mambarc,mambarc		setf yaml
+
 " MLIR
 au BufNewFile,BufRead *.mlir			setf mlir
 

src/testdir/test_filetype.vim

@@ -935,7 +935,7 @@ def s:GetFilenameChecks(): dict<list<string>>
     xslt: ['file.xsl', 'file.xslt'],
     yacc: ['file.yy', 'file.yxx', 'file.y++'],
     yaml: ['file.yaml', 'file.yml', 'file.eyaml', 'file.kyaml', 'file.kyml', 'any/.bundle/config', '.clangd', '.clang-format', '.clang-tidy', 'file.mplstyle', 'matplotlibrc', 'yarn.lock',
-           '/home/user/.kube/config', '/home/user/.kube/kuberc', '.condarc', 'condarc', 'pixi.lock'],
+           '/home/user/.kube/config', '/home/user/.kube/kuberc', '.condarc', 'condarc', '.mambarc', 'mambarc', 'pixi.lock'],
     yang: ['file.yang'],
     yuck: ['file.yuck'],
     z8a: ['file.z8a'],

src/version.c

@@ -724,6 +724,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1775,
 /**/
     1774,
 /**/