Fixed readme typos
- If you have a ARM 32 bit v6 architecture
```sh
- docker build -t qmcgaw/ddns-updater \
+ docker build -t qmcgaw/private-internet-access \
--build-arg BASE_IMAGE=arm32v6/alpine \
https://github.com/qdm12/private-internet-access-docker.git
```
- If you have a ARM 32 bit v7 architecture
```sh
- docker build -t qmcgaw/ddns-updater \
+ docker build -t qmcgaw/private-internet-access \
--build-arg BASE_IMAGE=arm32v7/alpine \
https://github.com/qdm12/private-internet-access-docker.git
```
- If you have a ARM 64 bit v8 architecture
```sh
- docker build -t qmcgaw/ddns-updater \
+ docker build -t qmcgaw/private-internet-access \
--build-arg BASE_IMAGE=arm64v8/alpine \
https://github.com/qdm12/private-internet-access-docker.git
```
