Fix the name of `pypy-5.3-src`

plugins/python-build/share/python-build/pypy-5.3

@@ -6,7 +6,7 @@ case "$(pypy_architecture 2>/dev/null || true)" in
     { echo
       colorize 1 "ERROR"
       echo ": The binary distribution of PyPy is not available for $(pypy_architecture 2>/dev/null || true)."
-      echo "try 'pypy-5.3.0-src' to build from soruce."
+      echo "try 'pypy-5.3-src' to build from soruce."
       echo
     } >&2
     exit 1
@@ -31,7 +31,7 @@ case "$(pypy_architecture 2>/dev/null || true)" in
     { echo
       colorize 1 "ERROR"
       echo ": The binary distribution of PyPy is not available for $(pypy_architecture 2>/dev/null || true)."
-      echo "try 'pypy-5.3.0-src' to build from soruce."
+      echo "try 'pypy-5.3-src' to build from soruce."
       echo
     } >&2
     exit 1
@@ -48,7 +48,7 @@ case "$(pypy_architecture 2>/dev/null || true)" in
   { echo
     colorize 1 "ERROR"
     echo ": The binary distribution of PyPy is not available for $(pypy_architecture 2>/dev/null || true)."
-    echo "try 'pypy-5.3.0-src' to build from soruce."
+    echo "try 'pypy-5.3-src' to build from soruce."
     echo
   } >&2
   exit 1