Fix typos (#1431)

Found via `codespell -L datas`.

docs/contributors/README.md

@@ -1,3 +1,3 @@
-Here we maintain a database of contributors, from which we generate credits on release blog posts and social medias.
+Here we maintain a database of contributors, from which we generate credits on release blog posts and social media.
 
 For the HTTPie blog see: <https://httpie.io/blog>.

docs/installation/generate.py

@@ -55,7 +55,7 @@ def build_docs_structure(database: Database):
     tree = database[KEY_DOC_STRUCTURE]
     structure = []
     for platform, tools_ids in tree.items():
-        assert platform.isalnum(), f'{platform=} must be alpha-numeric for generated links to work'
+        assert platform.isalnum(), f'{platform=} must be alphanumeric for generated links to work'
         platform_tools = [tools[tool_id] for tool_id in tools_ids]
         structure.append((platform, platform_tools))
     return structure

extras/profiling/benchmarks.py

@@ -13,7 +13,7 @@ please run `pyperf system tune` to get even more accurate results.
 
 Examples:
 
-    # Run everything as usual, the default is that we do 3 warmup runs
+    # Run everything as usual, the default is that we do 3 warm-up runs
     # and 5 actual runs.
     $ python extras/profiling/benchmarks.py