add RaspberryPi3 to release template and fix release workflow SHA

checksum check.

Author: jens-maus

.github/release-template.md

@@ -15,5 +15,10 @@ ${CHANGELOG}
 ## :package:  Download:
 The following installation archives can be downloaded for different hardware platforms. To verify their integrity a `sha256` checksum is provided as well.
 
-- Intel NUC:
+- Generic-x86_64:
 <sub>:package: [thinRoot-${VERSION}-generic-x86_64.img](https://github.com/jens-maus/thinRoot/releases/download/${VERSION}/thinRoot-${VERSION}-generic-x86_64.img)<br/>SHA256: XSHAgeneric-x86_64.imgX</sub>
+
+- RaspberryPi3 Model B+, RaspberryPi3 Model B, RaspberryPi3 Model A+, RaspberryPi Compute Module 3, RaspberryPi Compute Module 3 lite, RaspberryPi Zero 2 W:
+<sub>:package: [thinRoot-${VERSION}-rpi3.img](https://github.com/jens-maus/thinRoot/releases/download/${VERSION}/thinRoot-${VERSION}-rpi3.img)<br/>SHA256: XSHArpi3.imgX</sub>
+<sub>:package: [thinRoot-${VERSION}-rpi3-kernel.img](https://github.com/jens-maus/thinRoot/releases/download/${VERSION}/thinRoot-${VERSION}-rpi3-kernel.img)<br/>SHA256: XSHArpi3-kernel.imgX</sub>
+<sub>:package: [thinRoot-${VERSION}-rpi3-sdcard.img](https://github.com/jens-maus/thinRoot/releases/download/${VERSION}/thinRoot-${VERSION}-rpi3-sdcard.img)<br/>SHA256: XSHArpi3-sdcard.imgX</sub>

.github/workflows/release.yml

@@ -240,7 +240,7 @@ jobs:
         run: |
           for f in */*.mf; do
             while read -r line; do
-              NEEDLE=$(echo "${line}" | awk '{print $3}' | sed 's/.*-\(.*\..*\)$/\1/')
+              NEEDLE=$(echo "${line}" | awk '{print $3}' | cut -d'-' -f3-)
               SHACKS=$(echo "${line}" | awk '{print $2}')
               sed -i "s/XSHA${NEEDLE}X/${SHACKS}/" release-template.md/release-template.md
             done < <(cat ${f})