Minor updates to README for Windows syntax for logcat instructions.

Modified 3 lines in README.md

Line 58 had:
`adb shell pidof -s 'com.nextcloud.client` (just one single-quote). Added a second single-quote to close the string and make it: `adb shell pidof -s 'com.nextcloud.client'`, otherwise the terminal will give you new lines waiting for the closing quote.

Line 59 & 60 use %HOMEPATH% environment var instead of %USERPROFILE%

- %HOMEPATH% will return `\Users\username`
- %USERPROFILE% will return `C:\Users\username`

Also added double-quotes around the entire path string in case username contains spaces, e.g. `C:\Users\user name`

For a PowerShell.exe terminal (what MS is starting to recommend over cmd.exe), the same lines can be used with a var reference of `$env:USERPROFILE` instead of `%USERPROFILE%`. I added in an extra hint line in the instructions to remind people of this.

Signed-off-by: Kerbalnut <Kerbalnut@users.noreply.github.com>

README.md

@@ -55,9 +55,10 @@ Easy starting points are also reviewing [pull requests](https://github.com/nextc
 *   download and install [Minimal ADB and fastboot](https://forum.xda-developers.com/t/tool-minimal-adb-and-fastboot-2-9-18.2317790/#post-42407269)
 *   enable USB-Debugging in your smartphones developer settings and connect it via USB
 *   launch Minimal ADB and fastboot
-*   enter `adb shell pidof -s 'com.nextcloud.client` and use the output as `<processID>` in the following command:
-*   `adb logcat --pid=<processID> > %HOMEPATH%\Downloads\logcatOutput.txt` (This will produce a `logcatOutput.txt` file in your downloads)
-*   if the processID is `18841`, an example command is: `adb logcat --pid=18841 > %HOMEPATH%\Downloads\logcatOutput.txt` (You might cancel the process after a while manually: it will not be exited automatically.)
+*   enter `adb shell pidof -s 'com.nextcloud.client'` and use the output as `<processID>` in the following command:
+*   `adb logcat --pid=<processID> > "%USERPROFILE%\Downloads\logcatOutput.txt"` (This will produce a `logcatOutput.txt` file in your downloads)
+*   if the processID is `18841`, an example command is: `adb logcat --pid=18841 > "%USERPROFILE%\Downloads\logcatOutput.txt"` (You might cancel the process after a while manually: it will not be exited automatically.)
+*   For a PowerShell terminal, replace `%USERPROFILE%` with `$env:USERPROFILE` in the commands above.
 
 #### On a device (with root) :wrench: