Fix capitalization: Dimension Integration Manager → Dimension integration manager

Based on https://github.com/turt2live/matrix-dimension
> An open source integration manager for matrix clients, like Element.

"Dimension" is one of the integration managers, and it is not something like Dimension Integration Manager, which could be abbreviated as DIM.

Also:
- Replace "integrations manager" with "integration manager"
- Fix typos
- Remove a line break

Signed-off-by: Suguru Hirahara <acioustick@noreply.codeberg.org>

README.md

@@ -64,7 +64,7 @@ Services that run on the server to make the various parts of your installation w
 | [Let's Encrypt](https://letsencrypt.org/) | ✓ | Free SSL certificate, which secures the connection to all components | [Link](docs/configuring-playbook-ssl-certificates.md) |
 | [ma1sd](https://github.com/ma1uta/ma1sd) | x | Matrix Identity Server | [Link](docs/configuring-playbook-ma1sd.md)
 | [Exim](https://www.exim.org/) | ✓ | Mail server, through which all Matrix services send outgoing email (can be configured to relay through another SMTP server) | [Link](docs/configuring-playbook-email.md) |
-| [Dimension](https://github.com/turt2live/matrix-dimension) | x | An open source integrations manager for Matrix clients | [Link](docs/configuring-playbook-dimension.md) |
+| [Dimension](https://github.com/turt2live/matrix-dimension) | x | An open source integration manager for Matrix clients | [Link](docs/configuring-playbook-dimension.md) |
 | [Sygnal](https://github.com/matrix-org/sygnal) | x | Push gateway | [Link](docs/configuring-playbook-sygnal.md) |
 | [ntfy](https://ntfy.sh) | x | Push notifications server | [Link](docs/configuring-playbook-ntfy.md) |