Fix some typos in the README and sponsor comments.

Author: mrbiggred

README.md

@@ -189,8 +189,7 @@ Sponsor and donor entries live in [`data/sponsors.yml`](data/sponsors.yml), whic
 ├── requirements-dev.in         # Dev-only dependency pins (e.g. Pillow)
 ├── requirements-dev.txt        # Compiled dev dependencies
 ├── scripts/
-│   |── find_tags_categories.py # List all existing tags and categories
-│   |── find_tags_categories.py # List all existing tags and categories
+│   ├── find_tags_categories.py # List all existing tags and categories
 │   └── optimize_image.py       # Optimize images for the web (PNG/JPEG → WebP)
 ├── data/
 │   └── sponsors.yml           # Sponsor & donor data (consumed by macros plugin)

data/sponsors.yml

@@ -6,7 +6,7 @@
 #
 # Sponsor fields:
 #   name         (required) Display name.
-#   image        (optional) Filename in docs/sponsors/.
+#   image        (optional) Filename in docs/assets/sponsors/.
 #   tier         (optional) Short label shown on the card (e.g. "Primary Sponsor").
 #   description  (optional) Short thank-you or description line.
 #   links        (optional) List of { label, url } pairs shown on the card back.