meson: fix building technical and howto docs

When our asciidoc files were renamed from "*.txt" to "*.adoc" in
1f010d6bdf (doc: use .adoc extension for AsciiDoc files, 2025-01-20)
the "meson.build" file in "Documentation" was updated but the
"meson.build" files in the "technical" and "howto" subdirectories were
not. This causes the meson build to fail when configured with
-Ddocs=html. Fix this by updating the relevant "meson.build" files.

Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk>
Acked-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Documentation/howto/meson.build

@@ -1,20 +1,20 @@
 howto_sources = [
-  'coordinate-embargoed-releases.txt',
-  'keep-canonical-history-correct.txt',
-  'maintain-git.txt',
-  'new-command.txt',
-  'rebase-from-internal-branch.txt',
-  'rebuild-from-update-hook.txt',
-  'recover-corrupted-blob-object.txt',
-  'recover-corrupted-object-harder.txt',
-  'revert-a-faulty-merge.txt',
-  'revert-branch-rebase.txt',
-  'separating-topic-branches.txt',
-  'setup-git-server-over-http.txt',
-  'update-hook-example.txt',
-  'use-git-daemon.txt',
-  'using-merge-subtree.txt',
-  'using-signed-tag-in-pull-request.txt',
+  'coordinate-embargoed-releases.adoc',
+  'keep-canonical-history-correct.adoc',
+  'maintain-git.adoc',
+  'new-command.adoc',
+  'rebase-from-internal-branch.adoc',
+  'rebuild-from-update-hook.adoc',
+  'recover-corrupted-blob-object.adoc',
+  'recover-corrupted-object-harder.adoc',
+  'revert-a-faulty-merge.adoc',
+  'revert-branch-rebase.adoc',
+  'separating-topic-branches.adoc',
+  'setup-git-server-over-http.adoc',
+  'update-hook-example.adoc',
+  'use-git-daemon.adoc',
+  'using-merge-subtree.adoc',
+  'using-signed-tag-in-pull-request.adoc',
 ]
 
 howto_index = custom_target(
@@ -26,7 +26,7 @@ howto_index = custom_target(
   env: script_environment,
   capture: true,
   input: howto_sources,
-  output: 'howto-index.txt',
+  output: 'howto-index.adoc',
 )
 
 custom_target(

Documentation/technical/meson.build

@@ -1,37 +1,37 @@
 api_docs = [
-  'api-error-handling.txt',
-  'api-merge.txt',
-  'api-parse-options.txt',
-  'api-simple-ipc.txt',
-  'api-trace2.txt',
+  'api-error-handling.adoc',
+  'api-merge.adoc',
+  'api-parse-options.adoc',
+  'api-simple-ipc.adoc',
+  'api-trace2.adoc',
 ]
 
 articles = [
-  'bitmap-format.txt',
-  'build-systems.txt',
-  'bundle-uri.txt',
-  'commit-graph.txt',
-  'directory-rename-detection.txt',
-  'hash-function-transition.txt',
-  'long-running-process-protocol.txt',
-  'multi-pack-index.txt',
-  'packfile-uri.txt',
-  'pack-heuristics.txt',
-  'parallel-checkout.txt',
-  'partial-clone.txt',
-  'platform-support.txt',
-  'racy-git.txt',
-  'reftable.txt',
-  'remembering-renames.txt',
-  'repository-version.txt',
-  'rerere.txt',
-  'scalar.txt',
-  'send-pack-pipeline.txt',
-  'shallow.txt',
-  'sparse-checkout.txt',
-  'sparse-index.txt',
-  'trivial-merge.txt',
-  'unit-tests.txt',
+  'bitmap-format.adoc',
+  'build-systems.adoc',
+  'bundle-uri.adoc',
+  'commit-graph.adoc',
+  'directory-rename-detection.adoc',
+  'hash-function-transition.adoc',
+  'long-running-process-protocol.adoc',
+  'multi-pack-index.adoc',
+  'packfile-uri.adoc',
+  'pack-heuristics.adoc',
+  'parallel-checkout.adoc',
+  'partial-clone.adoc',
+  'platform-support.adoc',
+  'racy-git.adoc',
+  'reftable.adoc',
+  'remembering-renames.adoc',
+  'repository-version.adoc',
+  'rerere.adoc',
+  'scalar.adoc',
+  'send-pack-pipeline.adoc',
+  'shallow.adoc',
+  'sparse-checkout.adoc',
+  'sparse-index.adoc',
+  'trivial-merge.adoc',
+  'unit-tests.adoc',
 ]
 
 api_index = custom_target(
@@ -43,7 +43,7 @@ api_index = custom_target(
   ],
   env: script_environment,
   input: api_docs,
-  output: 'api-index.txt',
+  output: 'api-index.adoc',
 )
 
 custom_target(